They'd get laughed out of town - or end up like Bo Xilai. China's new middle class is too rich and powerful for any band of old guard Communists to regain power over and the massive younger generation has zero interest in Marxist asceticism. 1949 is long gone.
Confucian authoritarianism, however, is quite freaked out by the changes in China, and that cultural clash shows no sign of ending in the next few generations. China's biggest challenge is now the same as our our own - to diminish the political power of financial frauds and operate honest markets.
You can't regulate away corruption when the regulators are just as corrupt as the people they regulate.