In France, the Senate hasn't the last word. The National Assembly does, and can rewrite any line put by Senators into the law.
Our Senate is a congregation of old notables put there to have a nice and long pre-retirement period with plenty of advantages at the cost of the taxpayers. Its only utility is to put a hold on laws for some times, it cannot do more. Senators are not elected directly by the people, ensuring an over representation of the Right. In the last 65 years, the Right had the majority for 62 years. If we could get rid of it, it could be a nice save. However, senators will never scuttle themselves.
About video-surveillance, I'm confident in the role the French Regulator (CNIL) can play. They are independent and with sharp teeth. Even megacorps fear them. If there's a risk about data, CNIL will tell.