I don't think Australia is killing international cricket.
Australia has taken a step up, the rest have yet to do so.
It was almost the same with the Windies in the 70s and 80s. Their batsmen were unstoppable, except for a few legendary cases.
Then in the 80s and 90s teams raised their standards and they were all equal again - relatively.
Now the Aussies have climbed the ladder some more - it's time the rest of the world climb, rather than ask the Aussies to descend.
They are so professional, they do not leave any stone unturned, and they must really have a lot of desire within, because a lot of other teams get complacent.
This is professional cricket that we're talking about.
I remember when we played cricket in our backyard, back in India, one could only bowl so fast. When a searing delivery ripped through the air and blasted the chair behind you, the only thing that would be said was - "Too fast. Re-Ball." You only could get so good and after that you had to stop or you couldn't play.
It isn't like that in the International arena, if you get better, it's time the opposition match up.
But I personally think the bulk of Aussie class will be gone after the next world cup...whether or not they take that too.