Interview with Stefanie Claudia Müller
I think that the term proletariat refers to industrial workers while precariat includes all the badly paid service workers, some of them even have an academic carreer. It is more about financial exploitation than a physical one. The difference is that Precarians are totally aware of their situation, they have travelled, they have more knowledge and a lot of them dispose of a very good education, which makes it even harder for them to stand the situation. You have more precarians in countries like Spain where you nearly have any social benefits and just the family as your last chance.