Let me just say, first. I have all the respect in the world for the guys at Paragon. I'm prepared to love them unconditionally for the rest of forever for giving us this game.
That being said...
If the devs didn't know, FROM THE OUTSET, that AE was going to be used for EXACTLY this, even with all their "safeguards", they were asleep at the wheel.
They approached it "creatively", rather than "mathematically".
And we had some DAMN fine mathematicians in the community who could calculate out maximum rewards for minimum effort.
And in the end when you're running regular content and you've got a few million saved up.
Meanwhile an AE Farmer farmer is running a farm with several TRILLION in the bank?
That kind of imbalance only persists for so long before people do the calculations themselves.