>> In terms of economics, this is more or less how the Keynesian Left
>> (including some who would call themselves Marxist) also define socialism: If
>> the economy is in difficulty, the government should spend its way out of
>> trouble.
>>
>
> So the Keneysian Left believes that what all Keynesians advocate constitutes
> socialism?
In economics, yes. They only differ on the extent of government intervention. On the one side of the spectrum are those who favour "quantitative easing", not because they are conscious Keynesians (they've probably never read him), but because they have absorbed his assumptions that this is the right and necessary thing to do; on the other end of the spectrum, mostly populated by "Marxists", they favour a more thoroughgoing state intervention. But in fiscal and monetary terms, they are almost identical.
They will, of course, have important differences in other respects.
-- Lew