Assume a mere 5% annual compound return and one would get more than double the "total" amount saved.
$750k for the wage slave, and $690k for the self-employed. That in itself would fund a pretty decent retirement.
At a more reasonable (average stock market over long period) 10% return, the wage slave would have a $2,147,000 nest egg, and the self-employed: $1,846,000.
The US government SS program actually impoverishes our retirement, it is a total rip off.