I disagree. Plenty of solid first graders play Origin and international footy every year (not so much for Australia).
There aren't enough stars to populate both Origin teams plus the Kiwis and the Poms so the rest of the spots (most IMO) are taken up by solid first graders.
I agree that between them, George and Tom Burgess are the equivalent of a star, but because they only play about half a game front rowers are cheap, and IMO don't count as stars. Plus their role is very simple and straight forward, and even the best front rowers are defensive liabilities. That's why Maguire pairs the Burgess twins with a smaller defensive player (like Dave Tyrell) at the other 'prop' position.
So while they might be 'stars' at their position, there are no front rowers who I consider 'stars', especially for purposes of remuneration. We all remember what Wayne Bennett said about the price of front rowers when we threw the bank at Justin Poore.