A lot of novels with similar premise are already doing that. This one is rather fresh since the MC isn't someone who's out to exploit the "system". He's just some dude who got thrown on a rocky boat.
MC is fucked beyond belief. he is RETARDED and AUTISTIC. No, calling him autistic is an insult towards autists. He is absolutely, definitely, 100%, fell down and hit his head on a sharp metal stick as a child.