First of all, I know NOTHING about Market Basket -- history, current situation and business model, etc.
I do know what organized crime and government has known forever -- you can pay people off to do what you want! Calling it "The Chicago Way" is as good as any ... it has been true from Al Capone to Rahm Emanuel, and it will be true forever.
Our founders knew it to be true, which is why they wanted to make sure that government was heavily hobbled in it's ability to reward it's "friends" and punish it's "enemies".
Certainly Market Basket may be 100% in the wrong ... in which case employees and customers have every right to abandon them. That is how the market works.
It could be that Market Basket was more generous with employees than made sense and now some of them feel "entitled". They are not. It could be that $40K for a cashier is over the top and $30K would serve as well ... or maybe not. That is up to them to discover.
I'm willing to bet that the author of the column knows no more than I, but they seem very certain that they do.