One of the easiest ways of asserting control over the private sector is to manage the money supply with a central bank. Naturally, Marx was rather fond of the idea.
Handing control over people's lives to politicians does not somehow make an economic system any more fair or equitable. All it does is make the exercise of power more arbitrary.
The US military received no pay at all between June and November of 1877. This wasn't the only time funding was cut off, and it reflected a (now forgotten) historical distrust of the military in Congress and in America overall.
Many people on the left regard economics as neither a science nor a principled field of study. For them, economics is just a pseudo-science invented as corporate propaganda, and people who push "free-market economics" do so because they are either evil or brainwashed by corporate masters.
Tuesday night, Donald Trump claimed that Americans have always been free and "will stay free" of "government coercion." The U.S. regime's many victims would probably beg to differ.