I think in order to disagree with the first one, you'd have to say that IF unions did not exist, then the middle class could have arisen some other way.
The second is just a stupid question in the first place. The third is phrased from the position of the anti-protectionist. A protectionist would probably say "so what?" to it being "economically protectionist".
Also, if a question already says "always", then I take it as a "100% NEVER EVER EVER DO THIS EVER" kind of thing.
For the first... you could have studied the originof the middle class and have determined that unions were not key in it. I dunno, it means people end up answering 2 questions based on their guessing as to what the questioner meant.
A protectionist to the third one could potentially agree with the first part of the question and disagree with the second part. I don't think there's any way to resolve this... sure, it doesn't matter too much in the course of the survey (when I found questions I couldn't really answer, I generally just went neutral and put it at lowest importance), but it's still a bad question which implies a bias in the questioner.
The second question is fine. It's one of those libertarian/authoritarian questions. "Moral" in that case is clearly something that some consider wrong but doesn't actually hurt anyone. Arguing that gay marriage should be banned would be a moral question, because it doesn't hurt anyone (except the ones getting married, yuk yuk yuk)
I guess so. In the same way that "Family values" seems to mean "Anti-gay" for many people, "morals" often seems to mean "not doing things which don't harm people but which are just bad". But I feel it could easily mean a lot of other things too - ethics in experimenting, responsibility in business or whatever.