Well they may think we are stupid, but then they may be right.
This MPs expenses scam has been going on for years, and even though we did not know the details, we knew they were claiming for all sorts of things, but we (the public) did nothing about it.
The MEPs in Europe are on an even bigger expenses con and we know more about that, but again we (the public) have done nothing about it.
So if the public dont get off their backsides and protest they will carry on doing it, which makes us pretty stupid.