The problem is that the Europeans had everything they needed for economic recovery except for some finances to jump start things. They had the workforce, institutional knowledge, and competent managers. The just needed help to buy the initial goods they needed to get people back to work. The US only needed to provide the funding and push for some cooperation.
The Nationalists in China though had major issues that contributed to their defeat. US funding would have gone into a black hole. US funding would not have been an impact UNLESS the Nationalists change some things.
1) Chiang needed to centralize the payroll of the army. Instead, he still paid money to the warlords who would then "pay" their troops. Of course, these troops rarely got their pay. The warlords would skim off a lot. Chiang always wanted to do this since the 1920s, but kept putting it off because he felt he needed the warlords. This was a huge issue. He didn't do it until the Nationalists had been all but defeated and reduced to Taiwan. The minute it happened, corruption in the army ended. Chiang should have done this after Japan surrendered.
2) Chiang needed currency reform as inflation, particular in 1947-1949, was running rampant and destroying confidence in the economy. Chiang knew of the problem, but he kept thinking it could be addressed after he defeated the Communists. Instead, once again he didn't do anything until after being left with only Taiwan.
3) Chiang needed to do some kind of land reform to win over the peasants. Once again, he wanted to do it for a long time, but kept putting it off until victory was achieved. Victory never happened. But he did it in Taiwan.
Despite Chiang's reputation as a dictator, he always hesitated to take the actions he knew were needed because he felt he was dependent on the support of the warlords. Although personally not corrupt, he never stopped his in-laws from pillaging the government.
And of course, the Communists got a lot of support from the Soviet Union. Chiang did need additional support from the US to counteract that, but without making those internal reforms, the Nationalists were still going to lose.
If Chiang had made those reforms early enough, say 1945-1946, then it's possible the US would have thought Chiang was a good enough bet to keep supporting him. He would have had a good chance to win the civil war.
The Nationalists in China though had major issues that contributed to their defeat. US funding would have gone into a black hole. US funding would not have been an impact UNLESS the Nationalists change some things.
1) Chiang needed to centralize the payroll of the army. Instead, he still paid money to the warlords who would then "pay" their troops. Of course, these troops rarely got their pay. The warlords would skim off a lot. Chiang always wanted to do this since the 1920s, but kept putting it off because he felt he needed the warlords. This was a huge issue. He didn't do it until the Nationalists had been all but defeated and reduced to Taiwan. The minute it happened, corruption in the army ended. Chiang should have done this after Japan surrendered.
2) Chiang needed currency reform as inflation, particular in 1947-1949, was running rampant and destroying confidence in the economy. Chiang knew of the problem, but he kept thinking it could be addressed after he defeated the Communists. Instead, once again he didn't do anything until after being left with only Taiwan.
3) Chiang needed to do some kind of land reform to win over the peasants. Once again, he wanted to do it for a long time, but kept putting it off until victory was achieved. Victory never happened. But he did it in Taiwan.
Despite Chiang's reputation as a dictator, he always hesitated to take the actions he knew were needed because he felt he was dependent on the support of the warlords. Although personally not corrupt, he never stopped his in-laws from pillaging the government.
And of course, the Communists got a lot of support from the Soviet Union. Chiang did need additional support from the US to counteract that, but without making those internal reforms, the Nationalists were still going to lose.
If Chiang had made those reforms early enough, say 1945-1946, then it's possible the US would have thought Chiang was a good enough bet to keep supporting him. He would have had a good chance to win the civil war.