"Eventually SS it will run out of money unless the US can get more new "contributors"."
SS is an equilibrium equation. When Reagan changed the rates, we knew there would be a surplus from that point until roughly 2010, when it would start going underwater.
At the zenith of the baby boomer's retirement, SS will only be able to pay out 70%-75% of its promises. The equation would be fixable by adding 1 point to each side (employer/employee). It's hefty, but it makes SS solvent into perpetuity, aka 75 years in actuarial terms.
After the baby boomers' retirement is over, the pressure will reduce, and the rates could be reduced as well...but, of course, won't be.
" How much? Put an amount on your answer."
I told you who to Google. Again, I'm not doing your homework for you.
Or keep looking stupid, when the answer is as close as a link.