National minimum wage hasn't risen with inflation for over 30 years.
Even the last increase, to $7.25/hr, was almost a decade ago. Even assuming 3% raise year over year for inflation, that means minimum wage should be at least $9.75/hr.
But that's not enough to live on anywhere in the US.
If we define "A living wage" to be the amount of money to afford a 1bdrm apartment, transportation, food, utilities, clothing, etc. then the national minimum wage should be somewhere between $15-20/hr. Even $20/hr isn't enough in some places such as the Bay Area in California where even renting a bedroom in a house is $1000-$1500 a month. And then when you throw everything else in, you basically have to be making over $50k a year, before taxes.