From Reason magazine. (H/T Hyscience)

Bullet point summary:

Myth 1: Unfunded state pensions do not represent an immediate threat and are therefore not in crisis.
Fact 1: In the best case scenario, some state pension funds will run out as soon as 2017. And the longer the states wait to fully fund their pensions, the more drastic the financial consequences will be.

Myth 2: State debt accurately reflects state liabilities. And state default is not a concern because the federal government will bail the states out before they reach that point.
Fact 2: Many government pension liabilities are kept off the books, so most states and cities underestimate their actual debt.

Myth 3: State and local workers are not overpaid. And even if they are, changing their compensation won’t make a difference.
Fact 3: While this is a complex issue, the total compensation package for state workers does tend to exceed that of their private-sector counterparts.

Myth 4: The financial crisis, which caused a depreciation of pension assets, is the real culprit behind pension underfunding.
Fact 4: While the recession dealt a severe blow to state pensions, the problem of pension underfunding dates back to the early 2000s. Many states had already failed to cover the cost of promised benefits even before they felt the full weight of the Great Recession.

And conclusion:

Here’s the bottom line: We can argue endlessly over when the pension plans will run out of cash, or what the true value of the unfunded liabilities is. We can even debate what the true meaning of being broke. But there is one issue where there is no room for debate. Once the pension plans run out of money, the payments will have to come out of general funds, meaning out of the pockets of taxpayers. If the states want to avoid this, they must push through reforms as soon as possible. A good first step would be to switch to accounting methods that show the true market value of their liabilities. Once those methods are in place, lawmakers should consider moving away from defined benefit pensions.

What states like Wisconsin and Ohio are doing is completely necessary. This is a real crisis, and we need to act now to make sure that taxpayers are not squeezed when the money runs out.