The correct answer to this open question is the following.
The French aristocracy objected to higher taxes because they had never paid taxes before and wanted to continue to have with that privilege.
One of the many reasons for the French Revolution was the social injustice and inequity of the French monarchy. Under the monarchy, the clergy and the nobles did not pay taxes. The heavy taxation burden was over the peasants and merchants. The unjust taxation over the Third State, the Commoners, the poor people, increase the anger of the Frenchs and accelerated the beginning of the Revolution.