"significant time?" The author dismisses it in a single paragraph because of a single chart which shows that stagnation is not only among the lowest earners. Yet the same chart clearly shows that the same level of stagnation is not present among highest earners. Minimum wage laws do not just affect minimum wage earners. They affect everyone. Minimum wage earners are hit the worst, despite the laws being intended to help them.
It also affects inflation, which the author posits as the leading cause of stagnation (misprediction of inflation). Minimum wage causes inflation, and the effects of it are unpredictable, because you don't know who is going to raise their prices to make up the additional employment costs, or who is going to lose their jobs because smaller businesses downsize because they can't afford the increased minimum wage costs.
It also affects inflation, which the author posits as the leading cause of stagnation (misprediction of inflation). Minimum wage causes inflation, and the effects of it are unpredictable, because you don't know who is going to raise their prices to make up the additional employment costs, or who is going to lose their jobs because smaller businesses downsize because they can't afford the increased minimum wage costs.