I don't necessarily agree with your premise, but I don't think it matters.
Who's "we" here? The people putting the politicians you're talking about into office are not likely the people who would benefit most by sending their children to charter schools. So what is that person supposed to do?
Everyone, generally speaking. It isn't like the kinds of anti-public-service politicians I'm talking about only ever get votes from the 1%, or even just the 50%.