When some people get rich, they indulge.
Microsoft co-founder and world's richest person Bill Gates, for instance, recently bought himself a Porsche 911. Virgin founder Sir Richard Branson famously drives his amphibious Gibbs Aquada around the U.K.
But other celebrities never abandon the thrifty habits that contributed to their success. Here are six successful leaders, including some of the richest people in the world, who haven't traded up.