You don't get CEOs and billionaires.

It's not enough to have more money than you could ever spend, you need to have all of the money.

They want the best minds working on this bullshit instead of FOSS projects that will make them obsolete.

Because their positions as executives is predicated on it. Literally how they got to these vaunted positions in the first place. The dispassionate cruelty and relentless self-aggrandizement is what enticed their predecessors and investor allies to promote them to the top of the Org Chart of one of the wealthiest companies in the world.

Employees are, after all, perfectly interchangeable and disposable. Finding new ways to squeeze them for their labor value is the best way to extract additional profit from them.

The ultra rich are so disconnected they don't care and don't have to. They literally are grinding millions of lives into misery so they can brag at the next Christmas dinner/country club/golf game that they made a billion and one dollars and their other family members only made a billion.