"This is unacceptable, and changing the coaching staff hasn't worked either.
I see a few ways out of this. They may seem radical at first, but hear me out.
Option 1. Introduce strict eligibility requirements to the Sheffield Shield. Want to play for an out of state team? Do your four years qualification first, as in international cricket.
Option 2. Scrap all Tests during the Sheffield Shield season so Smith, Cummins, Haze, Starc, Warner and Lyon can play. Drop Lyon for Green anyway, obviously. "
Just a reminder - Warner is retiring this year, Starc, Hazlewood and Lyon are all well into their 30's and will be retiring in 3 years. Even Smith is getting on a bit,.
The test players simply aren't going to be there.
HTH