How come the blinds got so big at the end of the 5DC

[betgo]

It looks like it was pushbot at the end. There were some strong players in the final 6 and this didn't seem to give them much of a chance to show what they could do.

It was a 5 day tournament with 550 players and started with real deep money. I wonder why the blinds got so high at the end. Was it the format or did the players play cautiously until they were forced to push by the blinds?