No. There are many motives why someone might promote a policy even when he doesn’t believe the policy is effective.
I would even find it plausible that most people promote or reject minimal wage laws based on a notion of fairness instead of effectiveness.
There are libertarians who believe that the state has no right to force a employer to pay a certain wage. On the other hand you have progressives who thinks it’s unfair for an employeer to pay 3$ per hour to his employee and for that reason the state has to intervene.
Do you think beliefs about the efficacy of minimum wage are necessary to promote or reject it?
No. There are many motives why someone might promote a policy even when he doesn’t believe the policy is effective.
I would even find it plausible that most people promote or reject minimal wage laws based on a notion of fairness instead of effectiveness.
There are libertarians who believe that the state has no right to force a employer to pay a certain wage. On the other hand you have progressives who thinks it’s unfair for an employeer to pay 3$ per hour to his employee and for that reason the state has to intervene.