Just in time for tax season, the Congressional Budget Office has released new data on distribution of the tax burden. Contrary to popular belief, they show that taxes on the wealthy have risen over time and that the Bush tax cut in 2001 barely kept it from rising further.

A convenient starting point is 1984. The Reagan tax cut was then fully phased in (which reduced the top statutory income tax rate from 70 percent to 50 percent) and the 1983 Social Security tax increase had already taken effect (which raised the OASI tax rate from a combined 9.5 percent to 10.4 percent). In that year, those in the bottom quintile (20 percent of households) paid an average federal tax rate (individual, payroll, corporate and excise) of 10.2 percent.

Those in the top quintile paid 24.5 percent, the top 10 percent paid 25.2 percent, the top 5 percent paid 26.1 percent, and the top 1 percent paid 28.2 percent. Thus, those at the top paid about two and a half times more than those at the bottom.

Fast forward to 2001 (latest year in the CBO study). The top statutory income tax rate has fallen to 39.1 percent and the total payroll tax rate has risen from 14 percent to 15.3 percent. If one knew these figures in 1984, almost all economists would have projected a sharp decline in taxes paid by the rich and an increase in those paid by the poor.

In fact, the data show that those in the bottom quintile are only paying about half what they did 20 years ago: 5.4 percent. This is down from 6.4 percent just the year before, owing to the Bush tax cut.

Those in the top quintile did pay a little less in 2001 than they did in 2000: 26.8 percent versus 28 percent. But this is still well above the average tax rate they paid in 1984. Interestingly, those at the very top saw virtually no cut at all, even though liberals constantly say that they got the lion's share of the 2001 tax cut. Between 2000 and 2001, those in the top 10 percent of households saw a drop from 29.7 percent to 28.6 percent and those in the top 5 percent saw a decline from 31.1 percent to 30.1, but those in the top 1 percent saw their effective tax rate virtually unchanged: 33.2 percent versus 33 percent.

All of those in the middle 3 quintiles paid less in 2001 than they paid in 1984. In other words, between 1984 and 2001 average tax rates for the wealthy substantially increased, while at least 80 percent of households paid considerably less. Progressivity rose as the wealthy now pay about 6 times more than the poor.

Looking at the share of taxes paid shows a similar pattern. From 1984 to 2001, those in the bottom quintile reduced their share of the total tax burden from 2.4 percent to 1.1 percent. Those in the top quintile saw their share rise from 55.6 percent to 65.3 percent. Among the ultra wealthy, the top 10 percent increased their share from 39.3 percent to 50 percent, the top 5 percent raised their share from 28.2 percent to 38.5 percent, and that of those in the top 1 percent went up from 14.7 percent to 22.7 percent.

In short, the poor paid half as much of the federal tax burden in 2001 as they did in 1984, while the rich paid about 50 percent more. Those in the middle paid about a third less.

One would think that those on the left would be happy about this trend. Instead, they constantly demagogue the wealthy as deadbeats unwilling to bear their "fair share" of the tax burden, and berate the Bush tax cuts for having "slashed" taxes for the wealthy while the rest of us pay more. As is so often the case, the truth is exactly the opposite of that portrayed in the liberal worldview.

Unfortunately, all taxpayers pay a price for the steeply graduated tax system that has evolved. A new study by economists Steven Cassou and Kevin Lansing shows that a flat rate tax would add significantly to economic growth. Published in the April issue of Economic Inquiry, it concludes that real per capita gross domestic product might rise by 0.143 percentage points per year. This may not sound like much, but it's the difference between doubling in 33 years instead of 36 years.