What does Mr. Collins's advice suggest about the importance of social respectability?

Elizabeth opens a letter to her father from Mr. Collins, offering his condolences for the unfortunate situation and also criticizing the Bennet’s lack of parental attention. Collins also implies his relief that Elizabeth turned down his proposal, since her acceptance would have tied him to this now disgraced family. Mr. Collins's advice to Mr. Bennet shows himself to be a pompous self absorbed jerk of the highest order!