Sometimes more, sometimes less. Sometimes, there is even a year-to-year decline. But understand that there has never been any rolling ten-year period in American history that overall stock prices have gone down!
Even during the depths of the Great Depression, stock values in 1933 were higher than they had been in 1923.
The administration hasn't cited the fact yet (and probably won't), but the pool of investment capital created by personal accounts should stimulate investment in the economy and generate sufficient continued growth that new revenues might go a long way toward closing the unfunded liability in the Social Security "Trust Fund".
I understand that, and maybe a month's worth is unrealistic but perhaps a percentage of the overall ... 'skimmed' and put into a real interest producing lock box.
What about that?