It's safe to say 80% of Profit made in the US is returned to federal, state/local governments in all the various channels of taxes.
Just between corporate tax rates, social security, and income taxes we can in general assume that's over 70% tax right there. The American tax system is by far the most complex in the developed world.
Here's what I pay:
-25% on income
-11% on social security
-12% gasoline tax
-8.75% sales tax
-3% income to health care (firm covers 80%)
-1.5% property tax
Misc:
Bridgetolls, DMV fees, luxury tax (boats, rv etc) fishing taxes, hunting license, smog fees, electronic disposal fees, water, garbage, sewage
Obviously the weightings aren't accurate, but it's a point.
Oh and I don't feel bad for Europe. They work 28 hour work weeks for crying out loud!