dr. bla housen and dr. rush hour, you point out payroll taxes represent only 70% of the total social security income in 2011. due in large part to general revenue transfers replacing lost income from payroll tax holiday. if we continue to replace payroll tax revenues, how long before social security is no long longer perceived as an earned benefit and what's that going to do for public support? go ahead, dr. blai house. >> i would say my answer to the second part of your question is no one can know when that point might be reached, obviously. but that statement is in the report, obviously, because we wanted to call lawmakers' attention to the fact that social security historically has had a certain rational for its financing. and it does go back to franklin roosevelt. if you read his early statements, he placed a very high level of importance on the notion that this was an earned benefit. he didn't want it to be merged in with the general budget. that's why we have a separate trust fund and payroll tax and