I had blogged about this earlier -- the big driver of the Social Security funding gap is the cap on income subject to the payroll tax. Currently, only the first $90,000 earned is taxed. All the income earned above that is tax-free. Yippee! That's great if you're high-income! But, not so great for everybody else.
Nathan Newman runs a great blog which is on the blogrool and here he cites a poll here by Quinnipiac University where 69% of respondents agree we should eliminate the cap on taxable income.
I hope Rahm Emanuel and other Dem leaders who run in wealthy circles to raise funds will articulate this position, so the opposition party can get bolder and more defined.