I think there's a flawed assumption there: that nasa's resources are being used to send rich fucks to space. AFAIK the rich fucks are using their own money (well, value they extracted from their workers, but I digress), with their own private space programs. if nasa stops funding its own, it will eventually have to rely on the rich fucks' plutoligopoly of spacecraft for any space travel needs (e.g., maintaining the ISS staffed, and the staff in there safe, launching and replacing communications and GPS satellites, ...)
it's not my tax money (my taxes go to Bolsonaro, yuck) but I still wouldn't like to see it wasted further enriching those fucks.