'Average Medicare enrollee is paying in $145,000 over the lifetime into the system, taking out $450,000.'

From the transcript of the April 22, 2011 PBS Newshour:

DAVID BROOKS: Well, I mean, as I said, your average Medicare enrollee, average income, making I don't know what it is, $50,000 a year, is paying in $145,000 over the lifetime into the system, taking out $450,000.