1 Tim 6:10
Accumulating money for the sake of accumulating money is immoral. Is that what the church is doing? It's unclear.
I think it's fairly obvious that they could be doing more charitable work with the money than they are (not saying that they aren't donig a lot, just that they have the capacity to do a lot more).
You are falsely interpreting the accumulation of money as a
love for money.
Anyone who wants to amass wealth does not necessarily love wealth. They love what they can accomplish with that wealth.
I don't know why the Church has saved up so much money - but there is no reason to assume that it is immoral.
I also don't like the, "They could do more" argument. Literally everyone could "do more" - but I am in no position to tell you how you could be "doing more" and neither of us are in any position to tell the Church how it could "do more".
The Church's charity work is an appendage to it's actual mission - which is to prepare the world for the Second Coming of the Messiah.
I believe that they time will come - and is not far distant - when the Church will begin to use that accumulated wealth to stockpile needful supplies in order to be prepared for the turmoil that precedes the Second Coming of the Lord Jesus Christ.
There will be meat in the House of the Lord.