with a retrospective measurement of need-satisfaction, in so far as the economic arrangement of society is organized in order to be sensitive to need rather than to profit
How do you propose to quantify, along a common denominator, different forms of need-satisfaction?
How do you compare education, health, food, luxury, safety, etc.?
This, however, isn't the main issue. Some socialists accept personal property and thus a market in consumer goods. No socialist, however, accepts a market in producers goods. Without such market, how can you value (quantify along a common denominator) producer goods (raw materials, labour and capital equipment)?
How can you tell how much a machine is worth, if there is no price for it discovered through competitive market transactions?
This is why the human species can have a significantly high level of productive output, but still not be able to feed and clothe 1 billion of its own people nor offer basic services to more than half of its global population.
First, this is very much a "glass half empty" perspective. Under capitalism, unprecedented billions are now fed and clothed at levels undreamed of by past generations.
The minority who aren't properly fed and clothed are all, with very few exceptions, residents of countries with particularly terrible governments, or the ongoing legacy of such governments. To blame free markets for poverty in sub-Saharan Africa makes no sense at all.
This is also true of the demographics of single capitalist nations: there could be, for example, thousands of vacant homes and yet thousands homeless.
There is nothing illogical about that. Homes tend to be vacant on a temporary basis. Allowing homeless people to live in vacant homes would immediately both drastically expand the list of the homeless, and depress the housing market.
Housing shortages, btw, are largely accounted-for by various regulations of the land-use and housing markets, from zoning, green-belt and other construction-restrictions to regulations that unnecessarily make housing too expensive, to rent control which depresses the incentives to build new housing.
Marxists take issue with the essential irrationality of capitalist, private property all the while noting that capitalism has, in its history, rapidly socialized and industrialized production to a point where human beings can satisfy every and all human needs, yet the productive relations still present barriers to executing this task.
There is one point on which I can agree (!). Essential to the capitalist (read: free market) process is that goods produced are
scarce in the technical sense of having more demand than supply at zero cost. In other words, not everybody can have everything. This, contrary to the illusion of various post-scarcity-believers, is an essential consequence of human nature and the physical world.
In (moderately) free countries, even the poorest people enjoy standard of living that would have been envied by the middle-classes of pre-capitalist (or early-capitalist) past.
Products under capitalism go through a process of being first only affordable by the wealthy, then by the middle classes, then by virtually everybody. Think cars, refrigerators, TVs, air conditioning, computers and cellular phones, all today affordable by most
poor Americans.
Today's luxuries become tomorrow's necessities and the following day's background possessions.
Poor people under capitalism are only
relatively poor. In other words, they only appear poor because others are so rich.
Education is the typical case where market signals get this wrong.
What "market signals", with governments dominating all phases of the education market? But pick any public service of your choice.
Free men are not equal and equal men are not free.
Government is not the solution. Government is the problem.