Maybe look at this another way:
The government should represent the interests of the people. If the people have shown interest in curbing these layoff behaviors, where thousands of people lose their jobs while management remains in place with no apparent cuts to the top billing, then why would lawmakers not want to translate these interests into legislation?
I get a reasonable wariness of keeping the government out of private business, but if you have a town of 10 people, all employed by local business owner, and that business owner lays off two people, you have a large percentage of the population affected. If the townspeople enact a local ordinance to prevent this kind of behavior in the future, would they be in the wrong?