You're mistaken. Most of the high end RWD cars (or sports cars) have a staggered setup, from the factory. BMWs, Porsches, Corvettes to name a few. Even the car I have now has staggered rims (not just the tires). It's useless on the AWD ot a FWD. But on a march I would say it's useless and even cause unwanted problems in ride and handling.
This is how you run a staggered setup on a FWD