Between the fact there there isn’t any quoting or additional context of anything Karl Marx wrote, and that the Mises Institute and its founder Lee Rockwell are historically supportive of the Confederacy, I would argue this source isn’t a good representation of legitimate critiques of socialist economics.
Money, of course. “The market isn’t with us” is some bullshit when we need to rapidly get rid of gas cars but car manufacturers are greedy shitholes.