From what I can see the ESL have a cap of GBP2.1M. It's not big but they can have 2 marquee players in that.
ESL salary cap rules that each Super League and Championship Club is permitted to have two Marquee Players whose Salary Cap value is limited to £150,000 (or £75,000 if Club Trained)
Today's FX means GBP 150k = ~AUD 260k
Separately, they're allowed 7 overseas players. For 2023, Warrington have:
Peter Mata’utia
Thomas Mikaele
Matt Dufty
Sam Kasiano
Josh McGuire
Paul Vaughan
I'm making an assumption that out of your marquee players, they're in your overseas contingent - separately, Kasiano, McGuire and Vaughan. oof there's trouble right there - and not just for the opposition.
Std salary cap of GBP 2.1M converts into AUD 3.6M - not sure how much they're paying their marquee players, but you'd think that if Vaughan was chasing the money he'd stay here (unless the Warrington owner has deep pockets)....maybe he wants to do weekend trips to France, Spain etc, a la Nathan Cleary to Bali