How do they do it?

I can't think of another team that gets raped every year of their best players and are still able to stay competitive. Semi finalists in Europa League this year. A great farming program to develop new talents, then sell them at the right time.

List of of transfers:
Anderson : 31,5 Million € Manchester United.
Pepe : 30 Million € Real Madrid.
Ricardo Carvalho : 30 millMillion € Chelsea FC.
Lisandro Lopez : 24 Million € l'Olympique lyonnais.
Bruno Alves : 22 Million € Zénith Saint-Pétersbourg.
Lucho Gonzalez : 22 Million € l'Olympique de Marseille
José Bosingwa : 20.5 Million € Chelsea FC.
Paulo Ferreira : 20 Million € Chelsea FC.
Ricardo Quaresma : 18.6 Million € + Vitor Pelé in trade Inter de Milan.
Jardel : 18,3 Million € Galatasaray
Maniche :16 Million € FC Dynamo Moscou.
Deco : FC Barcelone 15 Million € + Quaresma .
Aly Cissokho : 15 Million € + 20%if transfered afterwards
Raul Meireles :14 Million € Liverpool FC.
Zlatko Zahovič : 13.5 Million € l'Olympiakos le Pirée.
Jorge Andrade : 13Million € Deportivo la Corogne.
Yourkas Seitaridis : 10 Million € FC Dynamo Moscou.
Hélder Postiga : 9 Million € Tottenham.
Derlei : 8 Million € FC Dynamo Moscou.
Diego : 6 Million € Werder de Brême.

I just find it amazing you can lose this much talent and still every season be in the hunt.