Another from IPI, including source references to total tax of 54% of annual personal consumption. Knowing that $2 are collected in federal taxes for every $1 collected state & local, that works out to be 36% embedded federal taxes.
Hmmm, a googling we do go.
Its easy to see why: the total U.S. tax burden is equal to 56 percent of annual personal consumption spending. 4
4. Personal consumption spending from Bureau of Economic Analysis National Income and Product Accounts; Total tax burden from U.S. Census Bureau, Statistical Abstract of the United States: 1999 (119th Edition) Washington, DC, 1999.