It wasn't Falcao who stopped it he's on 190k a week at United, it was Perez he doesn't like Mendes and he got Ronaldo involved with it
www.cope.es/detalle/Florentino-Perez-Si-traigo-a-Falcao-tengo-que-poner-de-presidente-a-Jorge-Mendes.html
I think he will ho to United next year too if they get Reus , I imagine there might have been a falling out with the whole Mendes thing and Ronaldo's part to play in it
it's not true
http://www.dailymail.co.uk/sport/football/article-2741030/Robin-van-Persie-dismisses-surgery-talk-fight-place-Radamel-Falcao-Manchester-United.html
United could spend 900m and still be within FFP , if they make the champions league this year FFP won't affect them untill the year after by then they make another 500m