[eMarkM]

From an ICM POV, the 2nd and 3rd biggest stacks are only margianlly +EV to call Giga's all-in with AKo. AQo here is a pretty clear fold for both. So these guys have to have very tight calling standards if they understand the game. They're just not that big of a favorites over Giga's likely live "any two" cards without a decent pair. Considering this, those two stacks can be put on pretty high calling standards. Putting them on tightest setting in SGA and the SB on Loose yields a positive for going all in on any two for Giga. Hence his push is correct (or not too far off) if the others know what they're doing and are willing to lay down seemingly premium hands.

If you change the short stack's chips to even worse desparation, like 600 and give BB 3310 and the button 2650, it's a huge mistake for them from an EV standpoint to call with any non-pair and no pairs below 99. That leaves only TT-AA that they can call with a positive EV. So UTG big stack is correct to push any two even more so here even though the other two stacks are much closer to him and can cripple him. Fold equity and the Gap are at their strongest at this stage. It's only correct for them to call here with a bigger pair. That's it. And you have no fear of the small stack calling, cause he can't really hurt you too much anyway.