Well that 2/3 is spend earning money that allows you to make the 1/3 better. Obviously there's a delicate balance there, but it's not as if they're wasting 2/3 of their lives. A friend of mine works 9-5 in a big corporate company and he loves life - he's paid well (or, well enough), never has to pull long nights or answer e-mails on the weekend. Gets home in time for dinner with the kids and to put them to bed.

(and can you really factor sleep in this? No matter what your state of employment everyone needs to sleep)