This is Charles Murray's Real Big Idea, his plan to rip out all the various entitlement and welfare programs run by the government, and replace them with a simpler, flat, yearly cash grant to each American citizen.
He calls this The Plan, which:
… makes a $10,000 annual grant to all American citizens who are not incarcerated, beginning at age 21, of which $3,000 a year must be used for health care. Everyone gets a monthly check, deposited electronically to a bank account.Murray's arguments for this are impressive and detailed. You can read a short version here (from which the above quote comes); if you don't want to get hold of the book, that's probably the best place to start. A friendly interview with St. K-Lo is here at National Review Online.
Then, you might want to check Harry Farrell at Crooked Timber, who has a number of interesting observations and criticisms from a moderate-lefty perspective. (On the other hand, if you're interested in a largely thoughtless attack consisting mainly of ad hominem and invective, then Ezra Klein at The New Republic is your go-to guy.)
All in all, much recommended for folks worried about increasingly unaffordable entitlements. I wonder whether the current political climate, which seems to rely mainly on fervent wishing that we can somehow maintain the status quo, will allow serious discussion outside of think tanks and journals.