I don't necessarily think size is an indication of whether an organisation is pursuing its original goals.
Well of course you don't, although it's amazing how much you can do with volunteer labour. . But I am not looking forward to the time when CAMRA becomes CAMRA plc or CAMRA International, with an obsession with 'the bottom line' and shareholders who demand dividends.
As JK Galbraith once said "small is beautiful"