You will be happier and more successful when you adopt this philosophy. Trust me, young 'uns. Don't let the fact that Robert Downey Jr. was a drug addict for most of his adult life dissuade you. In this case, he's absolutely right.
"It used to be the average full-time worker was paired with a full-time homemaker, and now neither men nor women have full-time homemakers supporting them. We need to get up to date by redesigning how we work in terms of the clock.”
— Phyllis Moen a sociology professor at the University of Minnesota and co-director of the university’s Flexible Work and Well-Being Center
Found this quotation in a great Slate article on an alternative work model called ROWE, the Results-Only Work Environment. It's a good read.