A 'national' minimum wage is nonsense. Let's treat it that way.

For the life of me I do not understand how the US can set a national minimum wage. Presumably the national minimum is set relative to the average cost of living in the US which has an index value of 100. Manhattan has a cost of living just above 200, while Harlingen TX has one of 80. Many millions of people live in rural or small town communities with even lower costs of living. Why should their wage floor be dictated by a remote bureaucracy that is stupidly imposing a single answer on a wildly diverse nation? 

It seems to me that it's time to stop arguing about whether and how much higher minimums affect employment and instead argue that there is and cannot be a ‘national’ minimum wage-except in Averageville, Average state, USA The people who propose these silly things need to be mocked out of the room.