Okay, well, depending on your time period, it's probable to say that most Muggles didn't have a chance at higher education. That's not their fault. Muggles didn't always have all the opportunities that witches and wizards do which leads to being poor or unwashed or sick (though it would have to be a real strong illness to be caught just from a handshake).
Those who have better opportunities and privileges have the chance to better the world around them. If/when you go home, teach a Muggle to read, help them find good work.