Common Late Stage Situation

[PokerGenius]

You have Ac 5c, you are MP1, you have 2M, seems like a simple push? Is it really?

background
240 runners in the live $550 tourney. 18 players left, the bubble has just been broken, and the tables have been converged. Blinds are 1500/3000 ante 500. You just got down from 45k to 10k and back up to 18k in an unsuccessful bubble abuse. The average stack is around 37k, however players are really liberal in calling me (KJ+ range).

So is pushing with A5s really automatic? With 6 people behind you, and 3 of the players having really liberal ranges, is it a EV+ push? Aren't you better waiting till players get eliminated, which was happenning every hand, and thus having less players to call your all ins?