I don't understand the concept that each state needs to have their minimum wage immediately changed to $15 an hour. There's are hundred of thousands of possibl

I don't understand the concept that each state needs to have their minimum wage immediately changed to $15 an hour. There's are hundred of thousands of possible factors that go into paying people in different economic areas with vastly different policies, laws, costs of living, etc. Not even including non-economic based policies that have had unintended effects on the economies of each individual state. Saying that "everybody should make 'x' dollars per hour" is so narrow-minded to me, but I'd welcome someone to help me understand. If you raise minimum wage up from (say) $8 to $15, what happens to everybody else in the state - do their wages go up by $7, or is their labor now worth $7 less because of this? Is this just a new phenomenon where everybody thinks their opinion is fact, and critical thinking is taking the backseat to what people "feel" is right - completely disregarding any other factors that might make the situation as a whole _worse_ than before?