[charlesdm]

The same reason people just don't care about everyone in the world and everything that happens around them.

For example: as a European, I am aware that both poverty in Africa and the war in Syria is an issue, but frankly and like many other people, it's not something I lose much sleep over. That doesn't mean I wouldn't help if I could (e.g. by donating money), but given these things are happening not that close to home, I accept them as a fact of life. The west isn't in a position to solve many of the issues in developing nations.

Also, just because someone is wealthy doesn't necessarily make them happy. There are plenty of unhappy wealthy people. Wealth often makes you lose your way in life, and for some it can be more of a curse than a blessing. Wealth aside, some people just don't care much for others. But on the flipside there are also plenty of amazing wealthy (and less wealthy) people that will go out of their way to help others.

Wealth accumulation doesn't come with a social contract that you have to try and fix social issues in society. Some people will, others won't. I don't see any issues with that.

This all said, obviously stealing is never acceptable. But I could understand how someone would own 4000 pairs of shoes, if they're compensating for say a loveless marriage, or some sort of emptiness in life.