It doesn't matter what it "should be." What matters is what is lawful. Do you agree with all of the country's laws? And yet, you abide by many that you would not agree with, or would deem to be wrong or at best inefficient.
Drivers should stick to 55 as best they can. It doesn't matter whether police start writing tickets at 56 or 70. That is not the same issue.
Good citizens don't decide which laws to break based on whether authorities are going to penalize the law-breaking. Further, good citizens don't pressure other citizens into breaking laws (such as by tailgating someone going the speed limit in a passing lane) based on enforcement practices.
Bull$hit. You can live your life that way, but don't judge others for using their brain. Laws are not
my moral compass. Never have I, and never will I, do or not do something because that's what the law says I should do (or not do).
The penalty that I might have to pay if I get caught not adhering to a law is the only consideration wrt the law. So, there are times where after weighing all the considerations, I will adhere to a law that I may not have otherwise (i.e. going 55 on a wide open straight highway where I know it is common for police to hang out) -- but the simple fact whether or not something is lawful is not a consideration.
Put another way, every time I adhere to a law, it's either because 1) My morals align with the law (often the case); or 2) The risk x cost of getting caught not adhering to the law is deemed too high.
It's never like, "welp gee, that's the law, so that's what I'll do."
And I'm absolutely the best -- safest, most efficient, and most helpful to others(*) -- driver on the road.
(*) "Helpful," for example:
1. If there is someone behind me that I'm clearly holding up, when I find a safe place to slide over and let them go around me, I do.
2. If I'm approaching a red traffic light, will be continuing straight ahead, and I've got two lanes to chose from, I won't be the first car stopped in the right lane so that I don't cause someone to have to stop and wait who would have otherwise been able to turn right and continue towards their destination.
3. If I've run out of time/roadway to get into the lane I needed to be in to turn at an intersection, I won't stop -- or even slow -- traffic to try to get to that turn lane. Without hesitation and without slowing the flow, I'll proceed past my turn, then find another way to my route.
Contributing to the overall efficiency of the flow of traffic allows people to get to their destinations sooner, and every time someone gets to their destination, that's one less car on the road. This is the mindset that every good driver has -- And it's the mindset everyone should have, IMO.