A basic question, when blinds are huge heads up (say 400/800 and above on PP and 300/600 up on PS), is the correct strategy to shove every hand from the SB/button heads up? You can't ever fold at these blind levels, or can you? Against a passive opponent does it ever make sense to just complete the SB and hope to see a free flop? Is there more to this sort of play than a game of chicken/three street bingo?

Party Poker No Limit Holdem Tournament
Blinds: t1000/t2000 ante t75
2 players
Converter

Stack sizes:
Hero: t10095
BB: t9905

Pre-flop: (2 players) Hero is Button with 2 3
Hero raises all-in t9830, BB folds.
Uncalled bets: t9905 returned to Hero.

Results:
Final pot: t11980