Of course I do. That's no big mystery. But it's a pay-as-you-go system. You don't take the money out of SS that you put in. You take money out that people are paying in right now.
To some extent it is. The majority of people take more value out of SS than they ever paid in (even after accounting for interest earned on contributions). That's particularly true for lower earners. The very first Social Security recipient, Ida M. Fuller, paid in $24.75 and took out $22,888.92. Not everyone gets a windfall like that. If you earned a lot or die young, you don't. But most people get more value out than they put in.
You can see the way it functions as welfare here:
https://www.ssa.gov/cgi-bin/benefit6.cgi
Say you were born in 1955, currently make $120,000 per year, and plan to retire at the end of this year. Your monthly benefit estimate is $2,863.00. Now say the exact same assumptions, but you earn $40,000 per year. Now your monthly benefit is $1,407.00. So, you earn a a third as much (and contribute a third as much to the system) but you take out about half as much. You are taking out considerably more, relative to what you put in, than the richer person. Why? Well, because it's effectively a welfare system -- a way to transfer earnings from richer people to poorer ones. It particularly helps people in poorer parts of the country, like the red states, where incomes tend to be lower. Their retirements are effectively subsidized by the more productive people in the higher-earning areas.
2009. Even though costs went down that year, neither Social Security nor government retirements had a reduction to reflect those lower costs. So, in real terms, incomes rose.