A contract, whether expressed or unexpressed, exists when two parties engage with each other for the reciprocal transfer of benefits.
Conclusion
An artist who accepts public funds creates at least an unexpressed contract with the public, and the public can rightly expect to benefit from the artist's work.
Evidence
Definition: a contract exists when two parties engage with each other for the reciprocal transfer of benefits. The artist takes public funds (one direction of benefit).
Evaluate
The flaw: the contract definition requires reciprocal (two-way) benefit. The author shows only one direction — public funds going to the artist. The author then concludes a contract exists and the public will receive a benefit back. But the existence of a contract requires the reciprocity to already be in place — you can't conclude a contract exists from the fact of one-way benefit and then derive the other direction from the contract you just declared.
Goal
Find an answer describing this move: applying a definition (which has multiple criteria) to a situation that only meets one of the criteria.