The Brazil centre-back opted to stay put at Parc des Princes this term after turning down a contract he deemed inadequate from the Catalans
The centre-back had already cited the handling of Eric Abidal's contract situation as one of several reasons why he rejected a move to Camp Nou despite being linked with the club all summer.
Instead, Silva opted to renew a contract that will see him earn €12 million (£10.1m) a year at PSG, and has now revealed that he was not prepared to accept a pay cut to move to the Blaugrana.
"It was a difficult decision to say no twice to Barcelona," the 28-year-old told Guardian. "It was never a secret that I have admired them since I was a kid and that I always wished I could play for Barcelona.
"But life is made of hard decisions that sometimes go against what you dream of. I heard people saying I was just thinking of the money, but they forget we have families to feed.
"Why would I accept to earn less money to play for Barcelona? Why are players the ones supposed to sacrifice themselves?
"Besides, PSG offered me also an opportunity for a new challenge and the club are trailing the right path."
The Brazil international is now in his second season with the Ligue 1 champions after a €42m (£35m) transfer from AC Milan in 2012.