Guys, there is no debate or doubt here. This is something Paradox must fix, else there is zero challenge here and they will soon lose all their customers. I'm sure they're fully aware of the trade income imbalance. The only question is, when will it be fixed. The game absolutely pointless to play right now because of this.
Money has always been rediculously abundant in EU4... it was always a matter of when, not if, your income went higher than your ability to spend it. Even in previous versions of EU4 only the first 50-100 years or so were balanced.