Social Security is a flat rate-funded retirement system which essentially screws middle income workers by requiring full payment for reduced benefits. This allows for increased benefits for low income workers and a tax cap/exemption for high income workers.
Of course this unwarranted exemption should be eliminated, but there is an even bigger SS tax loophole that should be addressed: Social Security taxes are only applied to "earned" income, not other income such as dividends and short-term capital gains. This is what allowed Warren Buffet to infamously claim that he paid less taxes than his secretary.
However, the biggest elephant in the room is Medicare/Medicaid (or whatever other euphemisms are in vogue to explain the insane amount of money we spend on medical care for the elderly). Should heroic treatment for terminally ill patients, with only the hope of extending their lives a few weeks or months, be a guaranteed right? To what end can these financially ruinous means be justified?