Prove it.
Show me how companies like Lehman, AIG, GM, Chrysler are better. Should we make the Defense Department a private company? What about State? Should we turn your local police department over to private security?
What about a quasi governmental agency such as the postal service? Should we turn them over to UPS or FEDEX? Right now you can send a letter for 41 cents. Can you do that with FEDEX?
And the fact is, if we listened to Bush, half of the social security trust fund would now be "lost" in the market.
The one place I do see where private works better than public is with schools.