At 15 dollars and hour, there would be no legal employment in the US for a huge chunk of the population. Australia has chosen to keep those people on the dole, but this doesn't fly in the US politically.
Obviously a generous and comfortable dole is the other side of the coin to a high minimum wage in a 'capitalist' economy, and is even more economically beneficial.
And further entrenching the underclass, incapable of ever getting off the dole. Your lordship, really, hates the poor, unless the satisfy his sexual needs.