> I don't understand how managers at amazon can believe this is okay
They probably don't. They have stringent targets for their team to meet in order to get their bonus (or not get promoted over, or not get moved to a worse area, or...). The pressure is passed down the chain.
> and that it won't blow off in their face.
Maybe they expect to have moved on before that happens? Or simply feel that have no choice because of that downwards pressure and not being able to afford to risk losing the job (a morally corrupt job pays the mortgage better than no job at all does).
They probably don't. They have stringent targets for their team to meet in order to get their bonus (or not get promoted over, or not get moved to a worse area, or...). The pressure is passed down the chain.
> and that it won't blow off in their face.
Maybe they expect to have moved on before that happens? Or simply feel that have no choice because of that downwards pressure and not being able to afford to risk losing the job (a morally corrupt job pays the mortgage better than no job at all does).