One of the ways to make an intractable problem seem easy is to underspecify it. Easy to do by accident. In this case, try enumerating who would govern, and wha

One of the ways to make an intractable problem seem easy is to underspecify it. Easy to do by accident. In this case, try enumerating who would govern, and what each possible actor might do to govern, or suggest to govern. There's a tree of options. For example, it might be a single car manufacturer, and might introduce the limit either globally or in some region. Or it might be a country, except not, because if it's a country it has to start with a department of the state or with a political party. If it's a political party, it can be in government or opposition. The tree is deep. I'll do one of the leaf nodes: A political party that's currently in government, including the relevant minister if there's a coalition. Such a party has to put forward a concrete suggestion, perhaps a hard limit 120km/h with mandatory 100% responsibility for any accidents if the limited is modified, with supervision by forcing the navigation and mobile phone companies to report user locations. Or it chooses some other concrete proposal. It doesn't matter, because whatever it is it'll get a collection of shitstorms about the concrete details. The people who think 120km/h is too high would flame it for having an obviously wrong speed limit, the ones who think it's too low would do the same, the data protection/privacy crowd would flame it for the big-brother-ish data collection (but without that, another crowd flames it for lack of enforcement), and so on and so forth. That a particular change is generally desirable doesn't imply that there exists anyone that can put forward an actionable proposal. Making the change actionable means providing concrete details, and those attract shitstorms. (On a semirelated note: a politician, a sometime finance minister of a large country, struggled for 10+ years to push through a worldwide reform that most people would consider good. The reform was put into force this year. I haven't seen that politician's name in any reporting in the past year.)