If you can build 200MW of power in one installation versus 200MW over 5 or 10 installations of PV or wind, the investment industry will look more favourably on giving you the money.

That's an argument to change the rules for the investment industry, not against microgeneration. The point, again, is power: once the large semi-monopolists are back in power on the market, they will again aim at stiffling the 'competition', not at expanding renewables. (This is one of the reasons feed-in tariffs work better than certificates; and that most - but not all - existing quasi-monopolist utilities make little use of, and fight feed-in tariffs tooth-and-nails.) So in the end, I am okay with large utilities taking part in renewables development, but the rules of the game should be set up so that there is a de-facto clear priority for new players entering the 'market'.

_{*Lunatic*, n.
One whose delusions are out of fashion.}