How exactly do you slowly push someone out without paying out their contract?
Just do exactly what Seamus did to Westover. Sacked him as coach but not as an employee of the club (he still had 2.5 years left on his contract at the time), telling him if he still wanted to keep getting paid he would have to turn up to Tigers HQ 9-5 Mon-Fri. No doubt to sit at an empty desk in the corner of the room. So Westover walked out on his contract and went to Japan.
It seems this exactly the same sort of tactics the Tigers are using again to get Gleeson to walk out on his deal, constant speculation, giving Anstey a 'director of coaching' job etc.