Those people would be driving 10mpg Range Rovers and Mercedes S class otherwise, not Prius. So yeah, big house and Tesla is working to reduce GHG emissions. Next is 12mpg diesel drivers with the best truck ever made.Tesla sells $90,000 luxury cars predominantly to people living in the largest houses in the world.
If you want to do something about the environment, drive your 10 year old Corolla into the ground or take public transportation.