http://www.thesoapboxers.com/how-many-people-make-more-than-250000-per-year/
In 2009, there were 350,000 tax returns with AGI over $1M, and 8,274 tax returns with AGI over $10M.
If we got another $1M in taxes from those 8,274 people, it'd raise an additional $8B for the government. That would be something like a 10% tax hike, from 36% to 39.6%. Hell, if we got $10M in taxes from those people, it'd be $80B or enough to reduce the deficit from $1.500T to $1.420T.
If we somehow were able to get $100,000 more in taxes from each of the 350,000 who make $1M, it'd be $35B.
It is deficit reduction, but doesn't really begin to address the problem. The problem is that government is a black hole for money.