The rich live in a space station ring where -every- medical problem can be solved in seconds by laying on a magic scanning table and basically pressing "Cure Me". The poor pay "space coyotes" to get them into spaceships the size of a bus (no suits, no Saturn V's, just climb into the bus), land on the ring, break into houses, and cure themselves by using these magic tables. Everyone has a ID tattoo, cataloged in the Great Evil Citizenship Database. The poor get some "hacked" tattoos that will temporarily allow them to fool the tables into curing them.

These magic immortality tables aren't available to everyone because, hey! Rich Citizens Are Just Evil!

Through a series of events, Matt Damon gets the means to reprogram the Evil Rich Computers to accept any ID tattoo to be able to live on the station (citizenship for everybody!) and heal the Poor Downtrodden Non-Citizens on demand. He gets outfitted with an exoskeleton and weapons as part of the deal.  

Jodie Foster plays the evil administrator of the station with the worst fake French accent I have ever heard. Seriously, a five year old could do a better job.

It was no accident this was previewed in a heavily Hispanic area, and no accident it's going to be released while "immigration reform" bills hit Congress.