> If the government should do anything its invest in a same-day/next-day shipping infrastructure that can be used by any business (say, via the post office or maybe a new package logistics agency).
Trend for half a decade has been to push private companies to fill the gaps and why the rise of DHL etc a few decades back. For any goverment to go against that grain would be a very expensive nightmare, even without the social and buisness politics.
Besides, if any western goverment had a service that good, the push to break it up would be emence and that's even presuming that such a service could be run cost effective to make it appealing.
I'm struggling to think of any country that has anything comparable and drawing a blank. Though mindful that the costs of shipping from china, sure do seem to be a huge factor in helping buisness's operate there. I've had items that have shipped from China to the UK at a price in which would just cover the packaging and to ship the same item using the UK postal service, just across the road would of cost me more than the item and postage.
In many ways Amazon do open their services to others, though to do that you have to operate from their sales store and as we have seen with mobile app stores - you can drag things on for ages, even with blatant issues.