The Spanish midfielder moved from Valencia for a club record £5.5million in August, and believes that the domination of Barcelona and Real Madrid is unhealthy for the wider game in Spain.
He feels that La Liga must follow the example set by the Premier League, where television revenue is more widely distributed than in Spain.
"Real and Barcelona are strong but the rest are in a bad place," Hernandez told The Times.
"Here, the clubs are more balanced in how they share the money from television.
"In Spain, it is too unbalanced. Smaller clubs can't buy players.
"We have got to follow the example set by England."
Hernandez has made 24 appearances for Swansea this season, scoring three goals.