What is the justification of red lights on cars?

Why our politicians, judges and bureaucrats want that there should be a red light on their cars? It has been learnt that there is always a tussle among these people for seeking a red light on their cars why this mentality? Do they wish that they should appear to be different then normal people or is it for safety of their car? If reason happens to be to distinguish from normal people then we need to know how they are different and what do they wish to show by this difference? Is it for getting noticed that they are moving like a VIP or just that they are superior? Why we are encouraging this in our society which already stand fragmented, for so many reasons. If the purpose is get attention and salute from the policeman posted on the crossings then also it is not proper. In any way it does not seem to be good for them as well as for the safety of people on road. If the purpose is to ensure safety then also it works against their own safety as the car of a VIP can be easily noticed by the person who wishes to hurt them. It is noteworthy that a red light with siren is necessary only on an ambulance so that it gets noticed and gets its way for hospital to save a life. But unfortunately misuse of the red light and siren has created a situation that even ambulances do not get way and people loose their lives.