Here's a good move, although it's more symbolic in terms of savings. IRS Stops using private contractors for debt collection:

So much for privatizing the federal government.

The Internal Revenue Service's decision this week to quit using debt collectors to dun delinquent taxpayers was celebrated by public employee unions as a pendulum shift after watching the Bush administration often opt for private contractors over federal workers to deliver government services.

From Senator Byron Dorgan's website: