Passage Summary: If a government-funded artist makes it big, they should pay the money back so the government can use it to help the next group of artists.

Conclusion: Successful artists who received public subsidies are morally obligated to repay them if they are able.

Reasoning: Repaying the money provides a necessary source of funding for other artists who also deserve support.

Analysis: To justify this conclusion, we need a principle that turns a 'good result' into a 'moral requirement.' The gap in the argument is between the fact that the money would be 'welcome' and the claim that the artist is 'obliged' to provide it. Look for a principle that states if an action supports a worthy cause or a public system from which one has benefited, that action becomes a moral necessity.