If those people would simply find a decent email provider, the spammers' market would dry up and spam might become a "thing of the past" once and for all. But for now there's no reason you can't switch to a decent email provider and forget about spam today.
The only way for the spammers' market to dry up would be if THEY STOPPED GETTING REPLIES to the messages they send out now. They still get replies to some (single digit percent?) of the messages they send out, and that makes them money. So they keep fighting (successfully!) against the majority of the Internet population and sending out new spam messages and keep trying to defeat anti-spam measures.
The spammers aren't the problem, the people who reply to spam are the problem.