inflation in not the primary driver. IT has to do with the early contributors only contributing a few years.
It is still true since reagan/oneill DOUBLEd the tax to 12.4% are '83
Should we double the tax to 25% to keep the ponzi scheme going ? THat is what Lindsey/Clinton would have us do.
Let's double it every generation until we all give 100% of our earnings to the gov't. and thank our lucky stars for anything we get back!