Lazy people plan more and in that are more likely to find the optimal solution.
They also put of things and alot of tasks negate themselfs or were redundant to start with. Manager asking for a report say. You could do it then and drop other things or you could leave it and if it is important you will get chassed up for it. If this happens alot a lazy person will write a script to do it, not tell said manager and gain from it. Others do the script, tell the manager and then get work bombed for no extra return. Lazy is in many ways another word for smart. Thing is though when you say lazy, most people think of poor hygiene, says a lot about them mostly.