This is from economist Stephen Moore writing in Investors Business Daily.

He writes:

Wisconsin is poised this week to become the 25th “right-to-work state,” ending forced unionization and allowing individual workers to decide if they want to join a union or not.

The Wisconsin Senate just recently passed right-to-work, and our sources in Madison say that the House, which is controlled by Republicans, will enact a similar law in the days ahead.

Republican Gov. Scott Walker, a leading presidential candidate, is sure to sign the bill when it gets to his desk. “This isn’t anti-union,” insists Walker. “It restores worker rights and brings jobs back to Wisconsin.”

Some 3,000 liberal protesters stormed the Capitol in Madison over the weekend to reverse the momentum for the new law. This isn’t Walker’s first dust-up with union bosses. Four years ago, nearly 100,000 activists grabbed nationwide headlines when they protested his reforms in Wisconsin’s collective bargaining process with public employee unions.

If the new law passes, Wisconsin would join two other blue-collar, industrial Midwestern states — Michigan and Indiana — to recently adopt right-to-work. “If you had told me five years ago that right-to-work would become law in Indiana, Michigan and Wisconsin, I wouldn’t have thought it was even remotely possible,” says economist Arthur Laffer.

Laffer and I have conducted substantial economic research showing three times the pace of jobs gains in right-to-work states than in the states with forced union rules that predominate in deep blue states such as California, New York and Illinois.

In the 2003-13 period, jobs were up by 8.6% in right-to-work states, and up only 3.7% in forced union states. Most of the southern states, with the exception of Kentucky, are right-to-work

Many auto jobs in recent decades have moved out of Michigan and Ohio and into states such as Texas, Alabama and South Carolina, due in part to right-to-work laws in Dixie.

But as union power recedes in the Midwestern states, many of the region’s governors see factory jobs returning to their backyards. “Right to work is already lowering unemployment in Indiana and causing a manufacturing revival here,” says Gov. Mike Pence.

Companies are more attracted to right-to-work states, and that means more jobs become available.

Here is Congressional testimony from James Sherk, senior policy analyst in labor economics at The Heritage Foundation. I really recommend bookmarking this article. Even though it is very long, it is up-to-date and comprehensive. I am linking to it because he responds to objections to right-to-work laws raised by unions.

Do right-to-work laws hurt the middle class?:

Union Strength and the Middle Class. Unions and their supporters frequently claim the opposite: that unions helped build the middle class and weaker unions hurt all workers—not just union members. To make this point they often juxtapose the decline of union membership since the late 1960s with the share of income going to the middle class. The Economic Policy Institute did exactly this when criticizing the possibility of RTW in Wisconsin. These comparisons suffer from two problems. First, the absolute standards of living for middle-class workers have risen substantially over the past generation. Inflation-adjusted market earnings rose by one-fifth for middle-class workers between 1979 and 2011. After-tax incomes rose at an even faster pace. Middle-class workers today enjoy substantially higher standards of living than their counterparts in the 1970s.

Secondly, these figures conflate correlation with causation. During the time period EPI examined union membership correlates well with their measure of middle-class income shares. Extending the graph back another two decades eliminates this correlation. U.S. union density surged in the late 1930s and during World War II. It peaked at about a third of the overall economy and private-sector workforce in the mid-1950s. During this time period America had few global competitors. From the mid-1950s onward global competition increased and U.S. union membership steadily declined. Between 1954 and 1970 union density dropped from 34.7 percent to 27.3 percent. Unions lost over a fifth of their support in just over a decade and a half.

During this period middle-class income and living standards grew rapidly. No one remembers the 1950s and 1960s as bad for the middle class, despite the substantial de-unionization that occurred. Over a longer historical period changes in U.S. union strength show little correlation with middle-class income shares. Liberal analysts come to their conclusion by looking only at the historical period in which the two trends align.

Do right-to-work states have lower wages?:

Unions Argue RTW Hurts Wages. In the same vein, unions argue that RTW laws lower wages. As the Wisconsin AFL-CIO recently claimed:

These anti-worker Right To Work laws just force all working families to work harder for lower pay and less benefits, whether they’re in a union or not. The average worker makes about $5,000 less and pensions are lower and less secure in Right to Work states.

This statement contains a degree of truth: average wages in right-to-work states are approximately that much lower than in non-RTW states. This happens because right-to-work states also have below-average costs of living (COL). Virtually the entire South has passed RTW, but no Northeastern states have passed an RTW law. The Northeast has higher COL and higher average wages; the South has lower living costs and lower wages.

[…]All but one right-to-work state has living costs at or below the national average. All ten of the states with the highest COL have compulsory union dues. Analyses that control for these COL differences have historically found that RTW has no deleterious effects on workers’ real purchasing power.

Recently the Economic Policy Institute has claimed that workers in RTW states make 3 percent less than workers without RTW protection, even after controlling for living costs. Heritage replicated this analysis and found that EPI made two major mistakes: it included improper control variables and did not account for measurement error in their COL variables. These mistakes drive their results. Correcting these mistakes shows that private-sector wages have no statistically detectable correlation with RTW laws. The supplement and the appendices to this testimony explain the technical details of this replication. Properly measured, RTW laws have no effect on wages in the private sector.

Although the history of unions shows that unions were a valuable and necessary check on the power of greedy corporations in times past, today unions are using the dues they collect from workers to elect Democrats. The vast majority of political contributions made by the big unions go to Democrats.

Here’s one example, using the Service Employees International Union numbers:

(Click for larger image)

So if you oppose what Democrat politicians are doing, it makes sense to free workers from being forced to pay union dues for causes that are against their values. The average rank-and-file member of a union does not share Democrat values on things like abortion and gay marriage, in my opinion. Why should they be forced to pay union dues that go to elect politicians who oppose their values?