Do you seriously think someone is going to spend $20k on ASIC hardware, and balk at adding a breaker panel?

Perhaps amateur mining will cease to grow (although it will always exist).  The wiring issues are the least of the problems for large miners.

The only real problem I see with mining is centralization.  That's not a problem in itself, but it creates a huge vulnerability.  And there's no way to fix it without pissing off the miners -- other than creating new miners.  And that's what responsibly self-interested large holders should seek to do:  Facilitate the creation of new, no-fee, merge-mining pools.  Like Elgius without LukeJr and with mergemining payouts.  P2Pool is a nice idea, but a trainwreck as software.