Following my earlier insights, I compiled a very rough estimation of the actual level of taxation, public and private, as a percent of the total personal income, using the National Income and Product Accounts data (http://www.bea.gov/).
For the year 2002, these figures are: - personal income (PI) $8,912 bn - personal current taxes $1,044 (or 11.7% of PI) - private "taxes" i.e. payments due to government underproduction of public goods:
$2,576 bn (or 28.9% of PI) - total taxation $1,044+$2,576 = $3,623 (or 40.6% of PI)
Payments due to government underproduction of public goods are personal consumption expenses (paid to private parties) incurred to cover public goods that in other developed countries are paid for by public taxes, such as health care, education, transportation, housing, culture subsidies etc. I made those estimation based on NIPA table 2.5.5 (http://www.bea.gov) showing personal consumption expenditures by type of expenditures.
I assumed that expenditures for medical care ($1,437 bn) and education ($188 bn) are 90% due to government underproduction of public good in that area (i.e. 90% of those personal consumption expenditures would have been saved, if the government provided adequate public health care and public education).
I also assumed that for owned housing ($822 bn), user-operated transport ($823 bn), and life insurance ($95 bn) - 50% is due to government underproduction of public goods.
I also added $199 bn paid in interests as "private taxation."
Wojtek