In capitalism rich/powerful entities don't necessarily have incentives to make the world (or even their own direct neigbourhood) a better place, and most big entities act only based on their incentives, not based on morals and ethics.
They however have strong incentives to invest all available resources into their own survival, prolong their own life and/or earn more money.
Depending on how the managment is in turn incentivised they will typically also prefer short term success over decisions that would make more sense long term — e.g. short term a search engine saves money by not spending a ton of money on quality when they are in a monopolist position, while in the long term it fould bite them.