As much as I despise Farage (and Cameron to be fair) I do believe he got the better of Cameron, even if the UK does vote remain there will be substantial campaigning for the reform of the EU. That reform will, I fear, do little (if anything) for the European Union as a whole.
Thats the beauty of the public discourse on this issue. You don't need to know anything about economics, how to regurgitate propaganda suffices.
The crux of this issue (at least for the Brexit side) is one of Immigration and control over one's borders and I don't really believe that it amounts to much more than that for the majority of the laypeople.