I believe that maybe open slather is the way to go anyway. Horses for courses. Maybe we should have a Commissioner, who can oversee and direct our playing strength, tell the franchises who they can have, and which position a player should fill. We are just not big enough as a sport in Australia to be too prescriptive.
There really is no simple answer, but I will say this... currently whilst Japan is growing their Tier 1 competition and the MLR grows, now isn't a bad time to be investing majority of our funding into our grassroots and resigning the fact that we can't afford to keep established players onshore.
Eventually, if the Japanese and Yanks want to really kick their competitions into next gear, they'll need to make changes to their competitions and invest more into their own grassroots, at that time, we may see a big reduction in the amount of Aussie's being brought across to their comps. That moment is likely a number of years away.
I know it isn't as simple as that, and there will always be money floating around, but the current climate in terms of lots of money offshore and not much money here in Australia, is enough for me to think it may be a good time to open the flood gates and let us select anyone for the Wallabies, let the boys go and earn some big coin with no consequences. Rebuild from the bottom up, pump all the funds into the grassroots and school-based comps and a paid 1st grade competition and then once we have a war chest again post 2027 RWC, we can make a play to rebuild Super Rugby.
That plan isn't for everyone obviously, but that's why we are in this mess! No one can agree or decide on anything.