This discussion about the recent NPR radio programs on Social Security Disability's programs suggest that there may be little or nothing wrong with Disability at all. They still don't mention Social Security Work Incentives, but it does seem like an example of cooler heads prevailing.
Incidentally, anyone who wants to understand economics and politics beyond moral denunciations and partisanship should make the Washington Post's Wonkblog a daily visit.
I also recommend these two other, less panicky views of Disability:
Leave Disability Insurance Alone!
Matthew Yglesias, Slate.com
Yes, Disability Payments Are Up, But It's Nothing To Be Surprised About
Kevin Drum, Mother Jones