Which criticism has NOT been made about token economy programs in the treatment of the mentally ill?

Question

Quizplus · Accepted Answer

Token economy programs, where patients earn tokens for desired behaviors that can be exchanged for privileges or items, have faced various criticisms. However, the claim that there is no evidence of improvement as a result of these programs is not accurate. While the quality of improvement and the methodology of studies have been questioned, and ethical concerns raised, evidence does exist showing that token economies can be effective in modifying behavior in the mentally ill.

Which Criticism Has NOT Been Made About Token Economy Programs