You live on a farm and one day a stray dog shows up.
It looks like this: starving dog pic
You decide not to feed it because it's not your dog - it's not your problem.
But your whole house is completely stocked with food. You throw out large amounts
of table scraps and leftovers daily.
How many people would consider that to be evil?
It's not about the behavior and character of one billionaire over another. It's the DOING NOTHING while HOARDING MONEY that is the issue.
No one can argue that $50 million isn't enough to live a fabulous life.
Yet, many want to argue that 1,000 million (1 billion) or more is fine
as long as that person worked hard and didn't step on people to get it.
A billionaire is simply not a good person even if he or she does nothing.
You decide not to feed it because it’s not your dog - it’s not your problem.
But your whole house is completely stocked with food. You throw out large amounts
of table scraps and leftovers daily.
How many people would consider that to be evil?
Internally the person can justify his actions "You feed a stray dog one time, it will nag you forever, maybe call up his buddies because there is free food, and now suddenly you have a pack of stray dogs on your farm that are causing all sorts of trouble".
Such nuances are always present(I will stop with the dog analogy, because your original example and my addendum, dehumanizes people in need to dogs). but such is the harsh reality, that often arises with a direct personal transfer of wealth, people tend to form a dependency on the table scraps and those that provide them(even though they are losing literally nothing) resent it.
The solution you may ask to greedy billionaires and hungry homeless people, SOCIETAL or GOVERNMENTAL INTERVENTION, think about it, its the failure of whoever the fuck is in charge that a select few of their citizens have exploited the system so well that their wastage is equivalent to the GDP of a small country, and similarly there are many people that only dream of a roof over their heads!!