I feel people like Jeff Bezos, who already have all the money in the world, are more interested in winning/power and money is only a way of keeping score.

Bezos is probably interested in growing Amazon into the biggest business in the world, and part of that strategy is cutting costs to the bone.

What I'm trying to say is he's looking for a way to maximize Amazon's growth rate, not necessarily pinch pennies (pinch billions?). So if he can preserve his current strategy by giving a few billion away, I don't think he cares.