GB72
Money List Winner
The only way you achieve that is by reducing the number of players on the field (as League did all those years ago) but probably more drastically. Not sure as far as 7 a side but probably down to 9/10/11 a side. But youre still going to have a decent amount of large impact contacts
I think that you could achieve some success by reducing subs and making the time on the pitch longer in real terms to ensure that stamina has to be as important as bulk. NZ have had sucess at age grade rugby playing in groups based on size and not age but then you still are only kicking the problem down the road.