One cannot be sincere / ethical and be a billionaire simultaneously.

“Says who? You? Maybe they once were not that sincere and have since had a change of heart. BTW, the Gates Foundation has done a tremendous amount of good over the years.”

No. They might have done some good, but the harm of hoarding that much wealth outweighs their good contributions. Anyway, it’s not the billionaires fault per se, but our flawed systems that have allowed it to happen. If I or most other people were put in the position of Bill Gates in his heyday, we likely would succumb to our vices as well.

"“They are moving away from unfettered, no-strings-attached giving and toward increased donor control over organizations, and are blurring the lines between private investment and public benefit.” —Gilded Giving 2020, by Chuck Collins and Helen Flannery [17].

“Your “Giving Pledge” has a loophole that renders it practically worthless, namely permitting pledgees to simply name charities in their wills. I have found that most billionaires or near billionaires hate giving large sums of money away while alive and instead set up family-controlled foundations to do it for them after death. And these foundations become, more often than not, bureaucracy-ridden sluggards. These rich are delighted to toss off a few million a year in order to remain socially acceptable. But that’s it.” —Robert Wilson to Bill Gates, 2010 [18] […]" —What if I paid for all my free software? | arscyni.cc