Nobody gets that rich without throwing overboard any morals or ethics. You won't become a billionaire - let alone a trillionaire - if you are bothered by the wellbeing of other humans. Just being that rich is unethical, given that there are currently people starving to death on the planet.
To our society it's more important that few people have the opportunity to get insanely rich rather than that all people have food and shelter.
Priorities I guess.
It's more that the ultra-riches' money opens doors, enabling them to influence the public's perception of reality. Never mind 'think tanks', lobbying, lining politicians pockets to have them ignore the public's interests. Clip free speech here & there, or hammer critics with legal threats or troll armies. Maaany tools in the box when money is no object.
After a while this trickles down & promotes an environment where people really don't care about others' suffering. America first! Oh my, gas prices jumped! Groceries went up! Who cares about HIV infected babies in Africa.