If an artist receives a public subsidy to support work on a specific project -- e  g  , making a film -- and if this project then proves successful enough to allow the artist to repay the subsidy, is the artist morally obliged to do so
The answer is clearly yes, since the money returned to the agency distributing the subsidies will be welcome as a source of support for other artists deserving of public subsidies
this person, by acting this way, would provide general benefits with a value exceeding the cost to the person of acting this way