Well, That's New - Transterrestrial Musings - This post covers the statements John McCain made against cost plus contract abuses in Friday's debate.
I wouldn't actually try to eliminate cost plus contracts altogether, as they make sense in many cases, as do traditional research grants.
However, other mechanisms, like public/private partnerships, fixed price contracts, buying commercial services outright in the grocery store/ticket purchase sense, COTS-like incentives, and, yes, innovation prizes, are used far less often than they should be in the government aerospace procurement world.
Update: The discussion continues.