Disgruntle employees and ex employees have found out the their was a deal with companies like Google, Apple, Intel and Adobe not to poaches employees. This meant that anti-poaching agreements kept wages down. There are now over 100,000 people suing the companies for loss of wages.
How would that feel to find out the employers have this agreement which meant that you could not move to another company to get better wages because your employer had an agreement to not employ you. No wonder they are suing for loss of wages. The employees are making sure that they companies pay and are not getting away with it. There would be no incentive to improve yourself and move up the ladder when changing jobs.