Well, I think it's a puzzle why the data are turning out like they are, and it makes me wonder whether isn't something just fundamentally going wrong with the way the respondents are understanding the questionnaire, who those respondents are, and whether or not they are able to put themselves in the mindset to make realistic answers similar to what they would do in the real world. I hesitate to think about just applying the constraints band-aid in this case without coming to a deeper understanding of whether there is systematically something going wrong with the experiment.