You can not say that it will not make the environment for the game worse. Even IC, there will be problems.
Sure he can. Exactly as easily as
you can say that it
will make the environment for the game worse
There are already 2 features that can help to know the wealth of a Character/Family.
One of those is only usable to rulers, only usable against one character at a time, and is pretty disruptive if he's caught at it. The other tells you about families, not characters, which is a completely different thing, and is capped at 20k gold anyway.
No need to add another one that has more potential to bring bad things than good.
You have asserted that it will be bad, but have done nothing to demonstrate that.
Like Constantine said, if people start harassing someone who's hoarding gold OOC, then report it to the Titans. That's their job.
If people start bugging someone who's hoarding gold IC, to do something useful with it...well, then, what's the problem with that? Why should they be allowed to just hoard gold forever and not have anyone notice or care?