Nobody ever gave it a serious try anyway. Absolute emperors, absolute Generalissimos, absolute party. China never really experienced anything else in terms of leadership. To flat out say "it won't work" is you taking your mouth quite full.
And please not the "China is different" card again. Either explain how, or admit that it's just a cheap phrase to justify the status quo and you're not willing to discuss. I heard this one way too often already here in China. It's just an easy way to dismiss another person's - especially an outsider's - opinion.
Population is one of the biggest obstacles for the country. With a population of 1.3 billion (last time I checked), a better social security systems just isn't realistic. Instead the government is investing a lot of money into infrastructure and growth, the quality of life is getting better, more so for larger cities first but as time is progressing even the smaller villages are seeing the benefits.
Even if the Chinese people wanted democracy, trying to coordinate voting without corruption with a population of 1.3 billion would be almost impossible. Even with the small population of America I seem to here of the dead rising back to life just to make a vote, that's dedication I guess.
That aside there seems to be the matter of cultural values, most people here are much less worried about this as they're happy with the current government are seeing consistent good changes. Most have little interest in it and are more interested in their own personal lives.
At the moment the system is not perfect, but is working and working well, most people are happy with it, life is getting better all the time and China is progressing very well. Sure China doesn't have democracy or a government like what is being used in western countries, but what is in place here is working well so far. It's not like it was 10-20 years, things have changed and it's a whole new China. Problems exist, as they do everywhere, but they're being fixed gradually.
It's not perfect, but most people are happy with how it's working overall. It's most often foreign governments, foreign media and Chinese being backed, pat on the back, paid, etc who are bad mouthing China most. You think 50c is good? You're paid much better to complain about China and say how aweful it is.
Yes, China does have problems - give it time.
Yes, China isn't a democracy - is that what it really needs/wants?
I don't claim to have all the answers, but things could be much much worse. Things are improving all the time, so something must be right enough for the time being.
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I love Chinese video/mp3 players, the only one's I've found that go above 100% sound volume. 900%+ I think. I used to be plagued by 100% on every setting and still having some music and video being almost unhearable. The overlay subtitles/lyrics that are always on top with a transparent background are great too. So I guess not everything is copied, as I can't find these features in any English software.
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I know not everyone will agree, but these are my observations and what I've found from people I talk to here. Most really don't care about the government system as long as it's making things better, which it is.