This was a little dense, darthfanta. I hope you don't mind my breaking it up.
It does help however if the dynasty sinicized fully. Again it's too late of a POD. In the end however, Han and Manchu officials, landlords and nobles alike stole large portions of taxes--it wasn't just the Han.
To be clear, my point was not strictly that there was an increase in corruption. After all, to one degree or another, corruption was a constant. Nor was the problem that one group was doing it more than any other. If they'd just been hoarding money and setting up as influential landlords, it would have been little threat.
The creation of Han bases of power was a problem because as a general rule the empire's Han population simply disliked the Manchu, and outright despised being ruled by them. A Manchu official that set himself up in charge of - say - a new modernized navy could make himself a problem, but would be much less of a threat to the regime. Because, unless he were in the line of succession, any coup would break the dynasty - the system maintaining his ethnic group in power. And outnumbered 40 to 1, that would probably be that. A Han official in the same position could aspire to become a standard bearer for the resumption of self-determination.
TL;DR:
Corrupt Manchu officials with new power bases were a problem of the regime's efficiency and overall health.
Corrupt Han officials with new power bases were a problem of the regime's immediate survival and legitimacy.
The fact that the dynasty wasn't Han made it so that the government was especially vulnerable to criticisms. There's a reason why the utmost rallying cries against the Qing Dynasty in it's dying days was "expel the Tatar Barbarians, and to revive China". The Qing state was fundamentally apartheid. They segregated Manchu populations from the ethnic Han. The Manchu population also possessed privileges. It was actually illegal for Manchu women to be married to ethnic Hans for example, but legal for Han women to be married to Manchu men. If the Manchu committed a crime for example, they were legally exempt for some of the punishments. To keep the Han majority quiet, the Manchu regime basically had to ally themselves with the conservative Confucian landholding class as mentioned by Admiral Matt.
Quite so, quite so. Apartheid really is the closest parallel in the modern world, which makes the Qing effectively the largest and most successful attempt at that sort of thing in human history.
Just to waste time with a quick analogy:
An enemy intent on the destruction of Apartheid South Africa - having seized (say) Capetown, Port Elizabeth, and Durban - would already have won the war. The country was a delicate flower; broken, it would dismantle itself.
An enemy intent on the destruction of modern South Africa - holding the same cities - would find the war barely begun. As a popular state, South Africa would have the option of drawing the invader into a war of attrition - the "nuclear" option both the Guomindang and Communists had access to that the Qing could never consider.
while valid a sinicised china would still have collapsed as the qing did if only because of transaction costs and the sort of economic development china experienced.
I somewhat disagree. The way the Qing collapsed was very much influenced by the freedom of European states from local events, the cumulative experience of those states that intervening was low-risk and high-reward, and the state of global trade (i.e. how much of both presence and interest the West had beyond Singapore). So even the Qing would be unlikely to collapse as they did historically, were they to collapse at a different time, or if circumstances were different in Europe during the 1895-1911 window.
A fundamentally new dynasty would likely have had a dramatically different experience. I would not argue that it would suddenly revive and be totally stable. It couldn't. But more or less the same tricks that worked for Sun and Jiang, and worked
extremely well for Mao and Zhou, could have been done just as well generations earlier.
Besides all the major chinese dynasties allied with the landholder class. From the han to the ming majority of dynasties did xactly what qing did, only difference they didnt use racial discrimination as the basis for their exlusionary policies, so not really. Yes aparthed would not be present but systemic issues will remain and the han state finding itself in qing situation is going to collapse just when not if.
Allying with the landholder class is also what almost every governing system did with few exceptions throughout the history of Europe, the Middle East, India, Southeast Asia, and East Asia. Being allied with the landholder class is not some intrinsic folly bringing inevitable doom. The European powers whose jabs were undermining China were mostly allied with their landholder classes as well. So was Japan, which took a similar route to what I suggest could have helped in China.
China was better placed than almost any state on Earth to adjust itself to the disruptions of European industrialization, which is probably why it was one of the few places that was able to retain its independence. It accomplished some incredible things in attempting to adjust to the West, but ultimately not enough to avoid further embarrassments. If we slide the scale in the direction of more successful reforms, there is a point at which China bypasses the turn-of-the-century crisis.