Intelligent libertarian Megan McArdle says she rolls out her tax plan every year, like a Christmas display. Of course nobody pays serious attention. Being simple, fair, humane and fiscally prudent, it makes far too much sense. (Note that in Item 1, "a steep negative rate of up to 100%" means that, instead of taxing income at very low levels, the government GIVES you money to match what you earn.)

1) Get rid of all our poverty programs, except those aimed at the disabled, and temporary unemployment assistance, and institute the negative income tax. That is to say, the system should be continuously progressive, from a steep negative rate of up to 100% on very low earners, gradually declining until it zeroes out around $28,000 a year, and then rising gradually until it maxes out around 35% on the top brackets.

2) Eliminate FICA and pay for Social Security and Medicare out of general revenue. It's time to stop pretending it's a pension system, when there are no assets in the "trust fund"

3) Eliminate the corporate income tax

4) Eliminate the special treatment for capital gains. All income should be taxed at the same level, regardless of its source.

5) Eliminate all deductions. Period, end of statement. No mortgate, student, child, etc. All causes are equally worthy in the eyes of the person who possesses the deduction; it is a waste of our time as a nation to sit around arguing about who deserves what.

6) Just say no to the Value Added Tax. In theory, it's a good tax. In practice, because it is extremely hard to tell what proportion of the price of anything represents the tax, it removes the good and natural pressure upon tax rates.

7) Get rid of the estate tax, and tax the capital gains on whatever is sold.