But it is also clear that judges (who are notable left-leaning, if not far-left) are much more efficient at prosecuting right-wing figures (Fillon, for 0 reason this time).
This blend of comments strike me as odd. Are you actually complaining that a judicial system is too efficient at catching corruption at high levels? Is this bad? What point are you trying to make, exactly?
It is unfortunately way less efficient at jailing or expelling multi-reoffenders, who have entered the country illegally, then broken the law multiple times, been in front of judges 30, 40, sometimes 100 times, been officially notified that they have to leave France ("OQTF"), yet, are still free to roam around until they're 101st crime ends up in the news and everyone asks "how come the non-politicized judges let them out 100 times before?"