Ahahahaha... I believe many a burnt out trust fund kid in rehab would agree with you here. Sometimes I wonder how many people would end up dead or in rehab if they didn't have to go to work everyday. Not everyone, but a fair number I'm sure.
I think you're right that too much money that one didn't earn can be a problem.
But certainly money a person earned themselves is theirs to enjoy. I'm spending mine driving around Africa, it's great not to go to work for 2+ years !