[Partyfists]

There are a few things in play here that you may not be considering. First this minimum wage increase would probably happen over 5 years like San Francisco and Seattle are doing. So businesses would have time to prepare and it would not go from $9 -> $15. Second, these companies have many costs outside of labor. If labor were to double for just employees making less than $15/hr, the price of everything would not just double. It would have to go up, of course, but it would not double. The final thing to consider is that if every one in the USA is making more money, they will also have more money to spend. This means they are more likely to spend money at these types of businesses thus increasing daily sales for the company.

The argument you are making is an extremely common argument from before the minimum wage was instituted decades ago where minimum wage was also (relatively, of course) significantly higher than it is right now. It turns out that people do like to spend money and when they have more of it, they spend more of it.