They'e been punished before, just like us, they'll be fully aware of ffp. Back then it was a new thing and was worth the potential punishment to establish themselves as a force. Now it is a different story entirely, they're established already and the punishment would be more severe, they wouldn't put together this package if they couldn't afford it and fall in line with FFP, they're not amateurs.
They've yet to spend any money this summer, one signing offset by one departure for near enough the same fee with Alves their only other signing so far. I don't know why people think they can't afford it, we've spent more this summer, it's just because it's on one player. If we had not bought anyone this summer and instead put in a "£300 million bid for Messi, we'd get the same kind of stupid reaction. Even if they were struggling to afford it, they've got many sellable assets. They could go and flog Aurier to United tomorrow and get about £60 million from them clowns. They've got Di Maria, Draxler, Lucas Moura, Pastore and probably others that play in a similar position to Neymar, at least one of them will surely be sold to make room too which will make a sizeable dent into the Neymar fee too.