Ezra Klein has an interesting column (h/t Paul Roales) looking at where the Laffer Curve bends. The basic explanation of the Laffer Curve – and I am capable of no other – is that, on one end, taxes can be so high (e.g. 100%) that no one will bother working and tax revenues will be down and that, on the other end, taxes can be so low (e.g. 0%) that the government will capture very little tax money. Government wants to find the top of that curve – capture a lot of tax money without discouraging it’s citizens from being industrious. This is of some interest with the Bush-era tax cuts expiring and the Clinton-era tax structure reviving.
Klein interviewed a bunch of people and tried to get a sense of where the top of the curve might be. The tax experts and lefties he spoke to seemed to offer up a top marginal rate of 70% as the peak of the curve. The folks on the right he spoke with seemed more reluctant to offer a number but, where they did, seemed to fall in the 20-30% range. They also cautioned that, while short-term revenues might increase at higher levels, there was also a risk of limiting growth and, therefore, long term gains.
I can’t articulate it well and, may just be wrong, but my guess is that low rates are associated with an incentive to just move money around instead of doing different kinds of work that contribute more to productivity in the long term. About the best I can offer is that, if you can gamble, hit a jackpot, then walk away with enough money to quit the game, you might not bother with the harder work of creating a system that generates lesser, but steadier, gains year after year after year.