Dancing David
Penultimate Amazing
Most of the myths occur because people don´t understand the mechanisms in economics. One of the things that happens is that we tend to think that one action leads to a specific reaction. Well, maybe in Physics this is the case, but not in Economics.
Yes and no. Most of the time, a demand to increase the MW is a result of inflationary periods. When governments decide to increase the MW in this situation, this leads to more inflation. Then in this respect it is not a myth. It just depends on when it is that you increase wages. In stability periods it will not raise prices because higher wages are the result of rises in productivity or higher GDP for example.
This also depends on the circumstances. If the MW increases when no productivity has occured then costs will increase because labour costs represent a large proportion of total costs. So this will erode any gain in wages because prices will go up. But if the MW increases as a result of productivity or efficiency then any change in prices and costs will not affect real profits and real wages.
I understand all that but it is a question (What benefits or detriments are there to an increase in the minimum wage?) that I occasionaly pose to economists and financial types who are on a call-in talk show on my local NPR station, and they stateed these things as though they were absolutes, they did not couch it quite as carefully as you have.
I do understand that an increase in the minimum wage can be detrimental, I stopped being a union supporter (of non-local unions) when the auto workers struck for higher wages in 1979-1981, despite the fact that the economy was already in stagflation and the companies they worked for were bloated at best.