I know that many of them are very poor and it isn't their fault if they have to go to work in the factories. There are mudbloods at school who grew up like that and they're awful when they first arrive at school, but being at Hogwarts gives them those opportunities you mentioned. It's good for them. I know it's our duty to help the less fortunate, my father says so, so he doesn't mind if he has to pay for their schooling.
He also says I'm not to speak to muggles, though. I can't very well teach them to read when I go home.