That's what really gets me. He knew he was out, knew it went for review but was hoping (perhaps he knew - tin hat time) that DRS was going to fail. It's not the first time DRS has been iffy in this series in Australia's favour. Very disappointing.
I don't really have a problem with Carey not walking though. No one does these days. The (wrong) snicko mic was in the stumps next to the umpire - I've more of a problem he didn't hear what was clearly a fairly clear noise (travelled 22 yds to the mic). I wonder if there had been no DRS whether he would have given it.