Keynes noted in the final chapter of his General Theory, in a point highly relevant to a situation where mass unemployment is again soaring, that "a somewhat comprehensive socialisation of investment will prove the only means of securing an approximation to full employment".A good point.
That "somewhat comprehensive socialisation of investment" is impossible in a private sector-dominated economy. The decisive advantage China has in the present crisis is that it does not have to rely only on indirect means (reduction of interest rates, budget deficits etc) to attempt to reverse the plunging investment that is the driving force of this as with every major recession. China can use its large state-owned company sector to increase investment and instruct its state-owned banks to lend. That is why its economy is growing, while Alistair Darling is still pleading ineffectually for UK banks to increase their lending and while UK investment in housing and transport is plunging by 30% and more.
The thing about Keynes is that you can make Keynes work but not under a normal capitalist state in a normal capitalist market economy. It takes something like (1) China's one-party state or (2) war economy (of not capital-intensive wars like today's Afghanistan and Iraq wars but labor-intensive wars of total mobilization subordinating capital and labor alike to the state, like WW2) or (3) the working class so awesomely powerful that it might as well go ahead and do socialism instead of Keynes.
That's what typical Keynesians and typical anti-Keynesians (either of the Marxist or of the capitalist liquidationist kind) don't understand.