Truth or Consequences

So true, funny as it seems
Always in time, but never in line with dreams
--Spandau Ballet

Any economic/social system must cope with a handful of truisms.

Diversity. People are unique in their skills, taste preferences, cognitive abilities.

Bounded rationality. While the upper bound differs among individuals, people are limited in their cognitive abilities. The more complex the situation, the more difficult sensemaking and decision-making becomes.

Self-interest. People make self-interested decisions. This does not necessarily mean that decisions are 'material' or 'selfish.' Altruism and other non-material motives drive self-interested behavior as well.

Diminishing marginal utility. The more units of a commodity that an individual consumes, the lower the satisfaction per unit.

Resource scarcity. Resources are scarce, necessitating the need to 'economize' them.

There may be others, and will add as they come to mind.

The important thing to note is that these items are uncontestable. Any economic/social system needs to deal with these realities.