[american spirit]

I think I read somewhere that the fedgov's "unfunded liabilities" is in the area of 60-70 Trillion at this time. Is that a realistic amount and do you know what's included in those figures?

[Non-Sequitur]

In other words, tax cuts and privatization can´t drive U.S. economic policy unless the United States retains, or rebuilds, a meaningful tax base. If President Bush knows how to do this without reversing his outsourcing-centered trade policies, now´s the time to tell us. But that´s unlikely unless his opponents start asking him.

This more than anything else could hand the White House to Hillary in 4 years.

[Willie Green]

Is that a realistic amount

It depends on how far out into the future they try to project.
I'm not familiar with the source of your figures, but judging from the magnitude, I'd guess that somebody is trying to forecast what's gonna happen 20~25 years from now. IMHO, that would make the figures too uncertain to be reliable. Nevertheless, it would be the best guess we could make under present conditions.