Planet money did an episode on this. As often is the case it starts with a change in regulation. http://www.npr.org/sections/money/2016/02/05/465747726/-682-whe

Planet money did an episode on this. As often is the case it starts with a change in regulation. http://www.npr.org/sections/money/2016/02/05/465747726/-682-when-ceo-pay-exploded http://www.npr.org/sections/money/2016/02/05/465747726/-682-...