Public Opinion and Social Security: Political scientists Benjamin Page and Lawrence Jacobs have an excellent paper (PDF) on the foolishness of the Peterson Institute’s “America Speaks” event and the extremely strong public consensus in favor of Social Security. The whole thing’s worth a read, but the key takeaway lines are: “Support for Social Security is strong and widespread across the population, including among young people. Many more Americans want to increase spending on Social Security than want to decrease it, and that has been true for decades. Virtually any sort of benefit cut is opposed by substantial majorities of Americans.”
Of course, many more Americans want to keep taxes on the non-rich where they are than want to increase them.
Me? I'd simply uncap FICA, wait five years, and then see what the projections tell us.