Is this unethical

[jayheaps]

live tourney. 38 players left. 36 get paid.

A is the big stack at the table with around 80K. Blind are 400/800 ante 50. There is one very short stack at the table around 1100, let's call him player B.

A has been raising about 50% of hands and usually taking down blinds.

A is in the big blind. B raises all-in for 1100. folded to A in the big blind. A folds pocket Queens face-up.

I believe this is good tourney strategy on A's part, keeping a short stack around to enhance his chip lead, but about 4 players at the table, one of whom is an experience tourney player was outraged.

Thoughts?