For now.
Companies are accountable to customers in the continuous rolling election of the market. You can vote them out of your life at any time. It is the ultimate form of accountability. This is especially good because bankruptcy as a form of accountability can ultimately affect everyone in the company, whereas in reality almost all decisions made by governments are handled by unelected officials who persist across party elections and for which there's no systematic removal mechanism. They can't go bankrupt. In some countries they can't even be removed, as the civil service isn't directly controlled by the elected politicians. Mostly they fly under the radar, screwing things up for their entire lives.
At least with companies there's some sort of limit to how dysfunctional they can get before they lose influence and power.