The issue with having billions is that with maybe a miniscule amount of exceptions, no one person is able to generate billions. 99% of the time someone becomes a billionaire by starting or buying a company and maintaining a disproportionately large stake of ownership while the dozens or hundreds of people working for them receive a salary less than the profits they generate while receiving equity that is significantly smaller than the value that they contribute to the business. A truly ethical billion or trillion dollar company would be composed of a large group of multi millionaires along with a few millionaires and people living comfortable lives rather than a small group of multi billionaires and a few millionaires along with countless people struggling to get by.