The capitalist case for $15 minimum wage

See this article by Nick Hanauer. He's a businessman and raising the minimum wage is good business. The added income allows workers to buy products which they can ill afford on the current minimum wage. The increased wage would affect about 81 million workers to spend more on products that would increase the business bottom line, which then hires more workers, not less. Otherwise at the current wage workers need extra federal benefits, which cost would be greatly reduced with the higher wage.