> If you just landed at the airport, you rely on police enforcement keeping bad actors from having medallions.
Well that's not going to work. You now have people from outside the jurisdiction having a government they didn't elect cast in the role of their protectors. Instead what happens is the local government protects the incumbents, which is what we've seen in practice.
> Many cities required taxis to have their medallion number painted on the outside, and there were phone numbers you could quickly call (in the days of payphones even) to get quick information about a medallion or to report a complaint/problem with one.
As opposed to the license plates already on all cars?
> The history of taxi companies say that they are only as open as they are forced to be.
People keep trying to regard Uber as a taxi company. They keep claiming to be an app, because... they are. So replace the app with an open source one. Create an independent non-profit to handle payments and maintain a server to hold the driver ratings and take a small cut of the payments to cover its costs. Operate it as a live auction where drivers list how much they'll charge per mile and riders pick a driver based on their rating and price. Publish all the data.
If you do it well, people will use it voluntarily. If you do it poorly, you haven't demonstrated enough competence to be trusted making regulations that people would have to follow even if they're dumb.
> Competition is not the problem; destroying public safety regulations in the name of competition is the problem.
The problem is that incumbents call the things they use to destroy competition "public safety regulations".
> Neither would want to do that because their rating systems are secret sauce and "competitive advantage", they would need to be coerced by regulations.
Not when you can "coerce" them through competition. If people like the ratings system which is more open or the one that extracts lower margins and the app is otherwise fungible with theirs, they don't even exist unless they can be better than the competing system you created to do better, which implies that you failed to actually do better and then they're supposed to win. Which in turn applies pressure on the public system to do better itself, instead of getting captured, because if it gets captured then it becomes uncompetitive and actually has competition.