Large corporations have a Board of Directors composed of people voted into the position by shareholders. This means that large corporations need for the most part to do what shareholders want, or else they will be voted out.

There's also a matter of business competition. If Amazon stops worrying about profits, leverage, and expansion, that leaves areas that competitors can move in _within their domain_. This is why it seems all the big organizations behave sociopathicly: it's required to be on top.

Laws are designed to create limits on corporations to explicitly express how big businesses can behave, and it's not the businesses fault that those laws haven't been keeping up with the times.