Hahaha I think some of you fellas need to spend a bit of time at some of these clubs. The majority of the "subbies superstars" that are running around have pretty good reasons for choosing subbies over the more prestigious club competitions. Injuries, failing bodies, family situations (wife, kids, etc), and work commitments all hold pretty significant sway when a lot of these fellas choose to play where they do, not just the money that some of these richer Subbies throw about.
The majority of SS clubs operate in a semi professional way and expect their players to commit themselves to sometimes 3-4 training sessions a week. Pure and simply, a lot of very decent players cannot commit to this.
Some players come to the difficult decision of choosing between retirement and dropping down to Subbies. The reduced trainings and less commitment allows them to juggle rugby life and non rugby life and allows them to keep playing the game. Who are we to tell a player he's not welcome in Subbies because he's only 25 and might still be good enough to make a SS 1st or 2nd XV?
Your idea of sending the richer and more successful clubs to Canberra will do nothing to solve your perceived problem. The players rolling around for these clubs will simply find other subbies clubs. The vast majority of them do not want to play at a higher level.