Sunday, October 26, 2008

"What incentive is there to put forward that extra work effort?"

Greg Mankiw about the effects of marginal tax rates:

"Under the McCain plan, t1=.35, t2=.25, t3=.15, and t4=.15. In this case, a dollar earned today yields my kids $4.81. That is, even under the low-tax McCain plan, my incentive to work is cut by 83 percent compared to the situation without taxes.

Under the Obama plan, t1=.43, t2=.35, t3=.2, and t4=.45. In this case, a dollar earned today yields my kids $1.85. That is, Obama's proposed tax hikes reduce my incentive to work by 62 percent compared to the McCain plan and by 93 percent compared to the no-tax scenario. In a sense, putting the various pieces of the tax system together, I would be facing a marginal tax rate of 93 percent."

I'm not going to argue Sen. Obama's tax plan because it wouldn't be mine, but , in general, I agree here with Prof. Mankiw. Also with David Friedman here:

Everyone is paying less under the blue system, so the government is collecting less money. But it is collecting it in a way that has a larger negative effect, a greater excess burden aka deadweight cost, on the total amount that taxpayers choose to earn.

[I have focused on Obama's proposal because it is easier to explain its logic, but according to the Tax Foundation both plans raise marginal rates for many middle income taxpayers.]

My only question has to do with the effect of the debt on the economy. As I asked on Friedman's blog, but didn't get an answer:

At 5:44 PM, October 07, 2008, Blogger Don said...

Hypothetically, if the higher marginal rates had other effects that helped the overall economy, say by lowering the budget deficit and debt, could people's incomes increase such that even though they are paying a higher marginal rate, they're making more money to pay that higher marginal rate on, thereby changing the amount of money they can actually keep to roughly the same or more than they were keeping at the lower marginal rate. I'm not sure I asked my question clearly, but I'd really like an answer if you can figure out what I mean.

Maybe you can't understand my question either.

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