Are all non-monastic ways of life wrong livelihood?

Leading on from this answer - is it true that ultimately most or even all non-monastic lifestyles are wrong livelihood. Not being a monk I find this point of view quite challenging but just because I don't like it doesn't stop it from being true. Also I suspect that this might differ between traditions so if the school that the answer comes from can be highlighted in the answer that would be really helpful.