Over the course of this presidential election season there has been quite a bit of discussion of income taxation. As you can see from my blog post just before this one, Senators McCain and Obama have policy positions with respect to income taxation that are considerably different.
One of the tax themes that I don't like to hear is that the federal government should more heavily tax the wealthy. This theme goes along with the assertion that recent efforts to decrease federal income taxes have been to the benefit of the wealthy. What are the facts in this regard?
The two charts I provide here summarize data reported by the Congressional Budget Office. Each chart shows tax shares by income quintiles for all households.
The first chart, above, shows the share of just the federal income tax by income quintiles for all households, 1979-2005. The red line shows the share of the federal income tax paid by the top 20% of households by income. In 1979 the top 20% paid 64.9% of all federal income taxes and since that time this share has been increased so that in 2005 the top 20% paid 86.3% of all federal income taxes. It would appear that the often heard political mantra of "tax cuts for the wealthy" is just a bit inconsistent with the experience of the past 25 years regarding the federal income tax.
Of course, the federal government has other sources of tax revenue that are not reflected in the chart above. Notably, the payroll or social security tax is excluded from the chart above. The chart just below shows the tax shares for all federal tax liabilities, including the payroll tax.
This chart too shows that the top 20% of households by income have paid an increasingly larger share of all federal tax liabilities. At the same time, every other income quintile group has paid a smaller share of all federal tax liabilities over time.
It seems to me that a different political narrative and set of issues should be discussed. The distribution of the burden of financing federal government seems very unequal, and perhaps inequitable (dare I say unjust) to me. Is it fair or equitable for the burden of financing our federal government to fall so heavily on the top income households that this income quintile pays 2/3 of all federal tax liabilities? Is it fair that the top income households pay over 86% of the federal income tax liabilities? Is it fair that the bottom income households not only show no income tax liabilities as a group, but this bottom group actually receives payments from the federal government? After all, isn't the idea of government that it provides goods and services that all citizens share? If so, then shouldn't all citizens share in paying for the goods and services received from the federal government?
The distribution of the burden of financing federal government also may weaken our republican form of government. Look again at the chart at the top of this post. The bottom 40% of households by income pay a negative share of the income tax, i.e., people in these income quintiles receive payments. Doesn't this set up a bad set of incentives with respect to public policy, especially with respect to government taxation?
When I teach public choice to my undergraduate students we rely heavily on the median voter model. The charts above suggest we may be pretty close with the federal income tax to a situation in which the median voter is actually a person who has no federal income tax liability and who may actually receive payments from the federal government. If such a situation was the case then it would seem that the lower income households could see incentives to vote for politicians who would seek to help them take from the political minority.
Maybe we are closer to this situation than I think. After all, there are politicians campaigning, and it seems even leading in the political polls, who showcase their tax policy as making the wealthy pay more, as though the wealthy weren't already paying the largest share. After all, there are even politicians who say they favor redistributing the wealth. Is it now the situation in this country that the median voter prefers such politicians because it is expected he or she will be rewarded for supporting such politicians with more of the income and the wealth of others?
Or, is this stretching the history of the past 1/4 century a bit too far?
At least we economists should be able to offer another bit of insight into the present situation. For efficiency, we know that the benefit principle should be met. That is, for an efficient allocation of resources, each individual should pay an amount equal to their personal benefit at the margin for the goods and services provided by government. It seems likely that the charts presented above suggest we are quite a distance from the benefit principle in federal government taxation, and thus we are quite a distance into a government revenue and expenditure system which results in an inefficient allocation of resources.
One final observation. The politicians who have chosen the policy position of more taxes for the wealthy, are often (maybe mostly?) members of Congress. The data charted above are produced periodically by the CONGRESSIONAL BUDGET OFFICE. I think this means we can safely assume that the politicians saying "more taxes for the wealthy" aren't saying this because they haven't had the data at their fingertips.