. >> david walker used to be the government's top accountant, the head of the government accountability office, the gao. he now heads the peter g. peterson foundation, which is a strong advocate for reducing government debt. he says that 85% of the health care bills are paid by the government or private insurers, not by patients themselves. in fact, most patients don't even look at the bills. does that make any sense? most things you buy, the customer has some impact. >> we have a system where everybody wants as much as they can get, and they don't understand the true cost of what they're getting. the one thing that could bankrupt america is out-of-control health care costs, and if we don't get them under control, that's where we're headed. >> as we'll see when 60 minutes on cnbc returns, patients with their family's support often find it easier to hope for medical miracles than to discuss how they want to die. ♪ [ male announcer ] the way it moves. the way it cleans. everything about the oral-b power brush is simply revolutionary. oral-b power brushes oscillate, rotate and even pulsate to gently loosen and break up that stic