Five years ago, David Smith wore an expensive suit to work every day£®"I was a clothes addict, "he jokes£®" I used to carry a fresh suit to work with me so I could change if my clothes got wrinkled£®" Today David wears casual clothes – khaki pants and sports shirt – to the office£®He hardly ever wears a necktie£®"I'm working harder than ever," David says, "and I need to feel comfortable£®"