Yes, because I would do the same.
I don't necessarily believe all is above board. In fact I believe most/all clubs breach salary cap rules in some way. I just also think it is absolutely plausible, likely even, that a player would switch clubs due to factors unrelated to salary.
I also think calls for transparency are a bit pointless. I'd suggest no clubs are breaching the cap on the books. Publishing salaries and cap positions does nothing to stop any illegal breaches. The illegal breaches would still exist, just not published. Just like they are not reported to the NRL auditors.