> However the answerers on So are not paid. Why should tyhy waste their time on a user who has not shown they have put any effort in and asks a question that they have already answered several times before?

This is kind of a weird sentiment to put forth, because other sites namely Quora actually do pay their Answerer's. An acquintance of mine was at one time a top "Question Answerer" on Quora and got some kind of compensation for their work.

So this is not the Question-Asker's problem. This is the problem of Stack Overflow and the people answering the questions.