There are many ways to measure corruption, however, if you restrict it to the use of political office for personal monetary/financial gain the right seems to have done worse in the last, say, 30 years (we are talking about France).
Now for the second paragraph above : I often get irritated by Daniel Mermet ( I used to listen to him regularly when he had the 5-6 pm slot, less so now on the 3-4 pm slot) and turn him off.
For you people who do not listen to France-inter, most days he starts with a selection of messages left on his answering machine by his listeners. Considering that he is seen as left-leaning ( rightly so as far as I can tell) people who call in do it most of the time (I guess, messages are selected) to complain - often bitterly - about the current government, banks, finance, you name it.
Occasionnally you also hear the ranting of the opposite side about those left-wing complainers and against Daniel Mermet himself.
If I catch his program after that answering machine part, the content is often quite interesting although he does clearly give a preference to views from the left. The people he interviews tend to be knowledgeable and make sense. A comparison with the idiotic Fox news programs is therefore totally absurd.
Considering that his programme is only 5 hours a week out of 168 hours, giving 10 or 15 minutes to his audience to spill out their guts is not too big a price to pay to have a quality radio station. You get the distinct impression that those people never get a chance to be listened to, only on those 10-15 minutes per day.
Now I don't know if you consider Daniel Mermet to be a pseudo journalist or a pseudo leftist, but I have heard him speaking from India and from many other places in the world (Bolivia, Lebanon, Cuba ...) where he was doing what seemed to be a rather good job talking to the common people as well as more influential ones.
Of course Daniel Mermet goes balistic whenever the topic is BHL (Bernard-Henri Levy), but that's another story.
Your assessment a bunch of clowns spouting garbage aimed at an audience of cretins. Virtually no attempt at objectivity, and lots of manipulation of information to make a point. may occasionnally be accurate, but he also digs out topics that don't get aired anywhere else. On the whole I would give him passing grades and i would be thrilled to meet him in person.