redeye,
I'm afraid I have to disagree with you. MDP has just spent over £50k getting his bits of paper - he has a right to get paid for his flying. Note he is also a commercial ie professional pilot. I would hope that he has some professional pride and acknowledge that his hard earned license entitles him to pay. Unfortunately there are those who seem to have no pride and insult themselves and their industry by working for nothing.
When I started I was told that there was no chance of getting any commercial work until you had at least 1000 hrs. Whether that is still true, I don't know, but it seems to be a good benchmark to set your aspirations by.
Go instructing and enjoy it.