Gregg Easterbrook's TMQ article brought up the link that I'd been looking for for 2011 taxes. http://www.taxpolicycenter.org/numbers/displayatab.cfm?Docid=3277 Per the link, the numbers for the quintiles (AGI) are: Lowest 20%: up to $16,812 20-40%: $16,813 to $33,542 40-60%: $33,543 to $59,486 60-80%: $59,486 to $103,465 80-90%: $103,466 to $163,173 90-95%: $163,174 to $210,998 95-99%: $210,999 to $532,613 99-99.9%: $532,613 to $2,178,886 On average, everyone who makes <~46k AGI is getting paid to live here by the others, and is able to partake of the benefits quoted above.
The people at the top should subsidize capitalism the most because without it, they wouldn't be at the top. You might call the process which elevated them to the top a subsidy that they receive continuously.