Of course voluntary is everything. Voluntary capitalism and voluntary socialism, otherwise knows as democratic socialism and democratic capitalism, two of the four system I distinguished in commenting on your Churcillian quote. The other two (dictatorial capitalism and dictatorial socialism) are to be excoriated because they are dictatorial and not because one of them is socialism. I take we are on the same page on this?

But would you also agree:

* In US political commentary, "socialism" is regularly toss about as intrinsically evil, as if "democratic socialism" was a unicorn, rather than a very real political option.
* US foreign policy for many decades has tended to support "dictatorial capitalism" and excoriate "democratic socialism," as if good = capitalism and bad = socialism; while all the while professing to believe good = democracy and bad = dictatorship.