I'm in somewhat the same world as @sandyf and definitely the same high-tax state, so MS is 100% about reimbursement for me these days, but I also agree that both kinds of shoppers are needed. I'm no longer willing to do purchase/return shops or anything that's strictly fee-based, but I made a living doing that for a short time when I was younger (and in a much lower tax bracket).
Like @shopperbob, I leaned heavily into favoring free market economy in my youth, but at a certain point in my career, was forced to join a union. I was miffed about union dues in my 20's and didn't see what the union was accomplishing for me, but now I am on the other side of that. I am looking into retirement planning, facing a potential demise, or at least reduction, of social security and now really happy that some who where older/wiser back then essentially forced me into a situation where I have a pension that was able to benefit from the boom of the 90's and grow for 30+ years.
I'm not going to be the one advocating for that sort of control in the MS industry, and we have long ago established that any type of collective bargaining on our behalf in near impossible, but would not be opposed to pressure form the government to bring our pay rates in line with other occupations.