No, I don't think being rich makes one lazy. As a matter of fact, it pushes the rich to become more greedy and to acquire more. Ask the rich if they consider themselves to be rich enough to rest and to lavish on their hard-earned money. I bet, no one will say, "Yes! I'm already rich, so I gotta stop here and retire." Still, they continue to make money by working harder than they used to be. They spend their whole life making more and more money, 'coz this grants them a sense of security and satisfaction.