I think it would be a lot of work to set up a communist system with the changes I propose here.
To set up a completely share-and-share-alike system, where everyone gets the exact same amount of gold? Sure, that would be pretty tough. You'd still have some variation due to all kinds of things like production changes, trade balances, militia payments, etc. But the essence of your proposed change is "from each according to their means, to each according to their needs". You said it yourself in your original proposal:
This would allow realms to ensure that those who need money get in in a clean and automated fashion. Should a noble be in need of a certain level of cashflow (to support a unit for example), this can be ensured regardless of where their estate is.
You're trying to implement an automatic system so that everyone will get whatever they need. The problem is that the system was designed so that doesn't happen. It is intentionally a "bottom up" system, and NOT "top down".
It is 100% intentional that not all nobles will have the same income. It is intended that the knight of a rich city makes more than the knight of a poor badlands. And quite possibly has a higher income than some lords. The system is intentionally unequal. Some nobles won't have all the gold they want or need. Some will have excessively large surplus incomes. That's the way the world works.
If you want to take away this intentional inequality among the nobility, then that's a major design decision. You'll have to convince Anaris/Tom that a return to a communistic "every gets what they need" system is desirable. Once you have buy-in that this is OK, then you can start threads like this to discuss the exact mechanics of how to make it happen.
