Because it will take decades for any lawsuits to make it through the courts. If they were to lose such lawsuits,
by that time they'll have already pulled out enough money to cover the cost of the lawsuits with the rest just being gravy.
They will move as fast as they can to make as much money as they can. By the time something could stop it they will be so deep in the pockets of our representatives that it will be hard to make it happen.