I would suggest that the reason that elections cannot produce a representative government should be stated explicitly (namely the principle of distinction). The focus on lobbying and campaign contributions tends to suggest that the standard reform proposals (regulation of lobbying and campaign finance) might be a good fix for electoralism. I think it is important to stress that this is not the case.
That depends what you mean by “representative government”. It would be more accurate to say that election cannot produce a legislature that represents the electorate “descriptively”. The claim that a legislature generated by election cannot represent the interests of the public does not follow automatically from the principle of distinction (unless you believe that persons are only capable of representing their own interests).