Because the Australian view is that wickets or runs in the County Championship are next to worthless.
In fairness to them, they used to be. Div 1 is now probably not far off the Sheffield Shield in terms of strength.
Without Warner & Clarke this 11 is the weakest team Australia have fielded in my lifetime. Only Watson would make the current England ODI setup & England are no great shakes.
What price are New Zealand to win today?