You are getting it wrong OP. Michael Jackson didn't die poor despite the debt that he is owing. Michael Jackson has a multi million dollar estate which he built and up till date, that property is still generating massive income which his three kids are getting their own share from that investment based on the percentage given to them. Michael Jackson asset that he left enough to take of his children and their children children.
OP forgets that many celebrities can even claim bankruptcy to avoid tax or pay up what they own, 50 cent has once filed for bankruptcy but soon after was seen in a video with huge amounts of cash.
These days you can not really know a man's worth because they can easily concile their financial transactions, assets and cash.
I am not too bothered about a man's wealth and OP so should you.