"If they did nothing, this type of thing would continue unchecked."
When a company is paying wages much higher than the competition they are either going to have to cut wages or go out of business.
Look at the unions at the airlines. They either agree to lower wages or the companies go out of business. The old airlines cannot compete with the Southwest Airlines of the world.
All unions suck. Look at the disaster that white collar teachers unions have caused in education.
Southwest is union.