And, heh, I've seen it argued persuasively that the U.S. now operates with the same degree of inefficiency (i.e. resources allocated less than optimally, not responsive to market conditions, etc.) of a centrally planned economy, just due to the concentration of money now. Sort of a de-facto central planning, even though it certainly isn't one in name.
I tried to find the links where I saw this, couldn't. I'll keep looking.