What is wrong with it.

[drmeow]

10. We do it with other things

There's even a DSM diagnosis for it.

Partly it is because we've been socialized to worship money over the greater good. But partly it is also be cause hoarding of money does not interfere with everyday life. If the hyper wealthy had to physically keep all their wealth with them in small bills (or if they had to carry all of their wealth with them from property to property) they would quickly be like those hoarders who can only get through their houses via a narrow path because of piles of newspapers, etc. But because hoarded wealth is housed in a bank or in investments or is otherwise invisible, the consequences of that hoarding to the hoarders is also invisible.