The owners are powerless and don't have the ability to fix the problem that they are ultimately responsible for? Too bad for the owners then.
Viacom, Disney and GE should be punished until bankrupt or until they fix their problems.
The stockowners' responsibility is limited to the stock they own, and is not involved with management of the company except for stockholders' meetings where votes are taken on various issues including appointment of board directors and which auditors to hire and whether to issue more stock. To have a voice in the stockholders' meetings requires ownership of voting stock.