PSG and Manchester City were the first two high-profile clubs to receive large fines under the rules which look to regulate clubs' finances in Europe. Under FFP, the French champions were hit with a €60 million (£48m) fine while their Champions League squad will be reduced to 21 players for next season.
And Le Graet says he is in support of the new rules as they look to limit "unnatural" spending, but has insisted French football needs PSG.
"The Uefa rules are a good thing," he told Canal+. "The sanctions fall at a bad time: PSG arrived with a very different share capital and has done well so far and has a great team capable of competing with the best in Europe.
"I like PSG, we need them in France, Paris needs a big team. PSG is essential to French football, but Uefa has the right to regulate the amount of spending which is unnatural."