Honestly, I think that they should start ticketing for anyone over 70-75 under any circumstances, with a little leeway. Anyone driving 80 or above should get serious, progressive, and incremental fines.
I think they should make it significantly harder to get, and keep a Driver's license. While I agree that reckless speed should be cracked down on, the biggest problem on the road isn't speeders. The biggest problem is the horde of hapless, distracted bafoons that shouldn't be allowed behind the wheel at all. The Autobahn and the Autostrada are pretty good arguments that speed alone is not necessarily "bad". You actually have to know how to drive in order to get a license in those countries (especially Germany) in the first place.
Of course, the car has to be capable as well. Half of the shitboxes on American roads shouldn't even BE on those roads.
Personally, I think anyone caught with a phone to their ear, or whom is otherwise distracted by a mobile device should lose their license for 6 months and pay a massive fine on the first offense, 1 year, and a bigger fine for the second, and serious jail time and a 5 year suspension for the third.
It's a daily occurrence for me to have to avoid some schmuck diddling with their phone. What kills me, is the asanine number of dickwads I see driving a late model, high end car... With a phone to their ear! Seriously WTF?!
My $15K 2014 FIAT has full Bluetooth connectivity and it's a base model. You can't tell me the asshole in the 2017 Mercedes S Class with the latest and greatest iPhone or Samsung to his fucking face doesn't have the same feature.
Anyways, I restrict my "fast driving" to track days on closed courses. However, there are stretches of hiway around here (Interstate 15 North of Escondido for example) where the speed limit is 70, but doing less than 80 will likely get you killed. That traffic flows between 80-85 MPH. It is what it is. The CHP won't even take a second look at any car going less than 90. They simply won't waste their time. Accidents are far less frequent on that stretch than anywhere else in the county, and a large portion of those that do happen, happen in the late night/early morning hours when the drunks are out and about.
Conversely, you drive on Interstate 5 South of Downtown San Diego, and everyone is always crawling along at a snail's pace and crashing into each other all damned day.
Bottom line, most people just shouldn't be allowed behind the wheel. Ever.