Then first close the loopholes that allow them to do that. If that still isn't enough, then ask them to pay more. Just don't complain if they decide to take their business or investments elsewhere.
http://www.cnbc.com/id/48120446/In_M...Out_Rich_Study
http://www.nypost.com/p/news/local/o...qGOYw30sbfgU1H
http://www.wtam.com/cc-common/news/s...rticle=9765589