With states facing nearly $100 billion in combined budget deficits this year, we're seeing more governors than ever proposing the Barack Obama solution to balancing the budget: Soak the rich. Lawmakers in California, Connecticut, Delaware, Illinois, Minnesota, New Jersey, New York and Oregon want to raise income tax rates on the top 1% or 2% or 5% of their citizens. New Illinois Gov. Patrick Quinn wants a 50% increase in the income tax rate on the wealthy because this is the "fair" way to close his state's gaping deficit.

Mr. Quinn and other tax-raising governors have been emboldened by recent studies by left-wing groups like the Center for Budget and Policy Priorities that suggest that "tax increases, particularly tax increases on higher-income families, may be the best available option." A recent letter to New York Gov. David Paterson signed by 100 economists advises the Empire State to "raise tax rates for high income families right away."

Here's the problem for states that want to pry more money out of the wallets of rich people. It never works because people, investment capital and businesses are mobile: They can leave tax-unfriendly states and move to tax-friendly states.

And the evidence that we discovered in our new study for the American Legislative Exchange Council, "Rich States, Poor States," published in March, shows that Americans are more sensitive to high taxes than ever before. The tax differential between low-tax and high-tax states is widening, meaning that a relocation from high-tax California or Ohio, to no-income tax Texas or Tennessee, is all the more financially profitable both in terms of lower tax bills and more job opportunities.

Updating some research from Richard Vedder of Ohio University, we found that from 1998 to 2007, more than 1,100 people every day including Sundays and holidays moved from the nine highest income-tax states such as California, New Jersey, New York and Ohio and relocated mostly to the nine tax-haven states with no income tax, including Florida, Nevada, New Hampshire and Texas. We also found that over these same years the no-income tax states created 89% more jobs and had 32% faster personal income growth than their high-tax counterparts.