I had random event when Taxes are 25% lower and the profit from trade is much bigger. This event lasts whole game! It is a bug? It would be nice for a couple of turns but It makes no sense to earn so much money for the whole time/game.
Also the event with pirates. Pirates are to strong. Much much to much to strong! I was the most powerfull in space but the pirates killed my whole fleet. How come pirates can have better army than most powerful nation in space?