Tax Consumption, Not Savings
Like philanthropy, saving is an act of self-denial that enriches your neighbors (by leaving more goods available for them to consume). But unlike philanthropy, saving is punished by the tax system (via the taxes on interest, dividends, capital gains and inheritance). That's nuts. When you tax saving, you encourage people – wealthy people in particular – to spend more and grab a larger share of the consumption pie. "More consumption by the rich" should not be among the primary objectives of the tax code.
The alternative is to tax consumption. I and probably most economists believe that a consumption tax is better than an income tax, at least in principle. You can easily implement a consumption tax with a Form 1040 that says: "How much did you earn this year? How much did you save? Now pay tax on the difference." And you can make that tax as progressive as you like.
~Economist Steven Landsburg in today's WSJ