The marginal benefit return on SS contributions by higher earners is only 15% of average income (which happens to be almost exactly the combined employee/employer payroll tax rate). This means that in return for contributing 15% of your pretax income for 35 years, you will get back a taxable lifetime annuity of the same amount at age 65-66. Actuarially, this is a terrible "investment."
This reduced benefit for higher earners is what allows SS to give lower earners up to 90% of their earnings, thus making SS a de facto means-tested welfare program. Why should earnings over $110K be exempted from this tax? I guarantee you that no one in this category would voluntarily contribute to this scheme, even if it increased their SS benefits. Instead, they would much prefer to keep the regressive drop in their marginal tax rates that they now enjoy.
Yes, social security is an absolutely miserable investment. The only way it can be justified is that at least those who do not plan and save for their retirement years will receive something when they retire.
But what if there had been no social security program? What if the government instead had offered the IRAs, 401Ks, and other tax free savings vehicles as an incentive to save--had allowed employers to match 401K contributions and deduct those from their taxes? What if the push had been to ensure that the culture made it socially desirable and 'the right thing to do' to save for retirement? None of that would have cost the government a dime but would have been a huge incentive for people to save. And if you make the tax consequences for early withdrawal painful enough, that is a strong incentive to leave the funds intact for one's retirement.
The advantages of managing one's own funds is that they can be invested so that they at least draw interest or hopefully grow in value far and beyond what interest alone can do. And they are your funds. If you die before you can use them, they are passed on to whomever you designate should receive them instead of disappearing into the black hole that is government. Because you would not be paying taxes on that money at any point, you would have ability to save more. Right now we pay taxes on the amount that is taken for social security taxes before the social security taxes are taken.
So what about the irresponsible who don't save, you say? Well whose responsibility is it to make people responsible? The government? You? Me? Or the person who is making the choices?
This is where I part company with conservatives...if, for no other reason, they often don't seem to understand the history of how it got started.
Prior to the roaring 20's, most people worked in a family business or on a family farm. As they grew older, they didn't retire...they simply took on fewer and fewer tasks..but still contributed.
The industrial revolution marginalized the elderly as farm population and small business employment (relative to past percentages) shrunk. The elderly were not phased out...they were simply dropped.
The Real Deal The History and Future of Social Security - Sylvester J. Schieber John B. Shoven - Google Books
When the great depression hit, unemployment amongst the elderly was over 50% (from memory). So you can see....something was needed.
What wasn't needed was a permanent system.
However, the "progressives" of the time were aware of the social safety nets of Europe (and apparently not aware of the issues associated with them), and thought we needed something similar.
And thus FDR got his way (after threatening the SCOTUS).
While I think the elderly needed relief I am not so sure we needed this program long term.
Had we phased it out (in favor of something else where you got what you paid in) when things were good (the 50's), we might have been O.K.