Wage compression is an intended effect of doubling the minimum wage. It will either cause the unskilled and skilled workers wages to narrow, putting them on more equal footing (the progressive wet dream) or it will cause the employer to raise all wages to account for and retain skill and experience, thus eroding the company's profit margin (another progressive wet dream).
What about those that lose jobs and can't get one? Government tit! What about prices inflating to cover the labor expenses that will erode buying power for everyone except high earners? Government tit, more minimum wage hikes, higher taxes to cover the cost of government milk, etc. Progressive social engineering needs everyone but the elite to be crawling in the dirt begging for scraps. They'll throw some out here and there to make sure the peasants keep hoping for a better day they promise to provide and keep "voting" the political class into power.
As Jerry Brown said last month regarding California's minimum wage law, “Economically, minimum wages may not make sense. But morally and socially and politically, they make every sense because it binds the community together and makes sure that parents can take care of their kids in a much more satisfactory way.”
As CowgirlUp likes to say, it's the optics that matter.