Not even that, but usually this comes with the actual big target on your back: Being publicly traded.

Now of course, you can be publicly traded without being a big corp, and you can be a big corp that is held privately. But usually these big corpos are the ones that are on the stock market, and yes, the moment that happens everything becomes secondary to your actual responsibility: To the shareholders. Line must go up! And an easy one is to fire more workers.