Let me begin by saying that I'm fairly certain Albert Pujols will return to St. Louis. Tom Brady would not leave the Patriots, Kobe Bryant would not leave the Lakers and Alex Ovechkin would not leave the Capitals.
The staple of the St. Louis Cardinals is Albert Pujols. He has always been a Cardinal, and he will always be a Cardinal. However, St. Louis' fate does not solely rest with signing Albert Pujols. There are plenty of players on this team that produce big numbers and come through in clutch situations.
If Pujols were to leave the team, they would have lots of extra money to throw around the league. However, this team pulled off one of—if not—the greatest comebacks in history with more than just high salaries.
This team is about continuity and teamwork, and I believe their best chance of success is to keep this corps together.