There are several, but the Big One is simple, and the market economics have to make an effort to overlook it:
Markets are NOT driven by
need. They are driven by
demand. If you are unable to demand (legally or, especially, economically), then you don't exist; perforce, you die.
Many libertarian/free-enterprise/market thinkers pay lip service to this. Ayn Rand, for example, makes a big deal out of her tautology "life
qua life". But the Objectivists® and other libertarians tend to use that as a way to support their
advocacy of wars and
anti-abortion crusades, NOT individual, human, and biological survival.
Goods and services are allocated by those who have money. Or, more to the point, power. To use the libertarian's explanation, money allows you to use the
Headgun. (As in, "gummint puts a GUN to your HEAD!") But try to feed yourself on your own initiative,
without money, in a market economy. In an economy where everything is owned, you are at the mercy of the market, even if you own capital.
Let us keep in mind that the state can make marijuana and firearms illegal, but the market can (and frequently does) make being young/old/black/white/female/male/poor/leftist illegal in its own, highly effective, way. Instead of prison, the market imposes homelessness; instead of lethal injection after a trial and several appeals, the market will hire private cops to immediately shoot you "in good faith" in the name of protecting its property.
The market, you may say, must act rationally in order to survive. Individual allocation decisions are ideally rational, but in reality, irrationality dominates all markets.
Rational Choice Theory posits that market economics will result in a near-perfect allocation of resources, but history shows that it's only a little better than "command" economies -- and that's only with certain kinds of economic transactions. Thus, market economies are very good at accumulating wealth, but its distribution is so lopsided that the low-tax, ultra-rich USA has an infant mortality rate that exceeds that of impoverished, Communist Cuba.
The reason why many of us here appear to support command economies is because the only rational choice we have left in dealing with these emerging crises (having wasted 30 years by cracking wise about singing
Kumbayah) is by "commanding" (with the Headgun) that our common survival be made a priority.
So, where's that "life
qua life"?
Life itself has become a commodity that must be paid for. It would work fine if we all emerged from the womb with a large bank account -- like Paris Hilton or
David Nolan -- but all we have is our labor; and if said labor is not demanded by the totalistic market, fuckèd be our name.
This labor slavery, of course, is attractive to the capitalist. It allows him to issue the commands and hold the Headgun, all with complete moral impeccability. In a post-collapse world, out-and-out slavery will re-appear under a new and improved name, guaranteed, and backed up by big gummints espousing Capitalism, Socialism, or some new Ism that in turn has the self-proclaimed blessing of God, Common Sense, and The Science.
Now, in your words, you "don't buy into the catastrophic collapse scenario". As with most lotteries, no purchase is required. Collapse scenarios are the most likely scenarios with our kind of economic growth. Continuous growth eventually meets certain limits of the market, the environment, or human ingenuity. If even one of these limits prevents people from acquiring a
needed resource, such as food, people will die. This is why many of us "buy into" the idea of overshoot followed by collapse. Not only do most of the models predict it, but it has been observed in nature and in previous human societies far more often than not. The goal is to find
homeostasis. But long-term, sustained homeostasis has never been observed to occur in human economies of more than a few dozen people.
Ever.The overshoot and collapse scenario, therefore, is a product not of some leftist intellectual's dreams of revolution and dancing in the streets with the brothas, but from decades of observation of human and non-human societies. The canonical material is in biology texts, not treatises on political economics.
To use the libertarian/sci-fi geek/Darwin Awards catch phrase,
"it's evolution in action, bwa-ha!"Being told to plan for the future by "command" is the least odious of the choices ahead of us. But I find it most likely that the commands, when they are issued, will rather transparently be part of a massive last-chance power grab designed to allow the powerful to survive by fleecing the rest of us right before the descent into the abyss. There will be too little done, too late, and the burdens will fall on those who have no part in the distribution of resources.
And then, many people will die. But the Market will survive.
--p!