Interestingly, all of these things that you mention were seriously considered and debated during the Constitutional Convention. Many very bright and influential men in attendance asserted that only those who had skin in the game such as property owners, business owners, and those with formal educations should have the right to vote... The original exclusion of women and African Americans is a testament to that rationalization...
I actually do think some sort of "skin" in the game should be required to vote beyond merely being an 18-year-old citizen of the country... Voting is a tremendous responsibility that has historically required no basis for earning that responsibility. Maybe that should change...