Eat the poor. The issue is one of balance of power, wealth grants power to the wealthy, either directly though control of companies etc. or indirectly through use of money for influence, lobbying, etc.
A good state for humanity is that everyone leads a flourishing life and we therefore have less crime, better education and health and generally a better society which needs less intervention from governments.
The vast majority of people will seek to protect their wealth, this includes the very wealthy, so very few people will give up any more than they absolutely have to even though there is an enlightened self interest to do so. If you earn 100k per year, in 10 years you will have earned 1 million of whatever currency you are being paid. It would take you 10,000 years to earn 1 billion, yes that's ten thousand years! No one needs to have 1 billion, even 100 million looks excessive.
It is in everyone's interest to have a stable society and not have wild economic fluctuations, bubbles, wars, market crashes, revolutions. Therefore there needs to be regulation and taxation to create a society that is seen as fair and allows everyone to flourish and to do that by curbing the worst excesses of the most acquisitive. The difficulty is that the wealthy have the power but the causal chain between the societal problems of the poor and the effects those have on the wealthy is very long and complex so convincing the wealthy-powerful to accept constraints is very unlikely.