History disagrees with that statement. Communism was China shooting itself in the foot in the first place. The Great Firewall is China shooting itself in the foot. The lack of numerous freedoms the developed world takes for granted, is China shooting itself in the foot. China has a very long history of regularly shooting itself in the foot. They'd be a far more advanced nation economically, scientifically and culturally, were they to end the Communist Party oppression.
The CCP has a pretty terrible record at avoiding shooting themselves (or China) in the foot. They probably killed more Chinese people than Imperial Japan did.
As for your specific point regarding teaching English, I think you're right they wouldn't do that now, however it's a bet I could see them make if their domestic economy becomes slightly larger. After all there are other countries (Japan, Russia, France...) where English has a low penetration rate, and they get away with it.
Yeah, because there are different factions within the party that sometimes have conflicting goals or ideas. It's not as unified as outsiders think it is. I agree that they aren't always scary competent. The whole Bo Xilai scandal was a huge black eye that they didn't see coming, for instance.
> The example I have in mind is the declaration last month by the foreign affairs ministry that the Hong Kong "Joint Declaration" is not binding any more for China.
What? I didn't hear about this at all. That does seem pretty crazy. Do you have a link to a news article?
> After all there are other countries (Japan, Russia, France...) where English has a low penetration rate
Don't know about Russia or France, but Japan still teaches English in schools. Japan and China probably have a similar "penetration rate" for English. They do lots of business done with English speaking countries but the average man on the street is by no means fluent. I suspect the same is true of France. If domestic consumer demand increases, China might be able to get away with it, but the export economy is so big, I can't see them making that choice.
>> On Friday, the eve of the 20th anniversary of Hong Kong’s handover, on 1 July 1997, Beijing controversially announced that the Sino-British joint declaration was “now history” and no longer had “any practical significance nor any binding force”[1]
Re: language. I am not saying that English is not taught at school in these countries (it is), only that it has minimum impact in these societies in practice. Right now China is trying to move away from its export economy (where indeed English is needed), and if it does I think it would make sense for a paranoid government to think "well these other countries are functioning without the common citizen knowing much English, so let's stop teaching it except to some professions" -- and pronto, the next generation is cut off from 99% of foreign news sources.
[1] https://www.theguardian.com/world/2017/jul/01/china-humiliat...
But that doesn't even matter - the main thing is the barrier to reading a lot, not getting the gist from one article. If you can read English, you'll probably encounter Western perspectives all the time on the Internet. But if you're forced to go through a broken Chinese machine translation every time you encounter something in English, you're going to stay on the Chinese parts of the Internet.