We always come back to the same problem with the IR. They're about intent, not about actions.
The IR say that you cannot ask, suggest, hint or even think that a character should change class. In fact, you should be surprised whenever you see anyone actually changing class. You need to treat a priest changing to warrior the same way you'd react if you saw footage of Pope Francis picking up a broadsword and charging the crowd at St. Peter's.
That doesn't mean you need to treat priests and warriors the same, on the contrary. If you want to direct your revenues into getting bigger broadswords, you're not going to give that money to a priest. You're going to give it to the warrior. The IR does not give you the right to a revenue, it gives you the right to be a priest if you want.
Reducing one's estate size is not the same as withholding incentives. It can be simply respecting a player's choice of class.
