Page "Economic calculation problem" Paragraph 35

Some writers have argued that with detailed use of real unit accounting and demand surveys a planned economy could operate without a capital market, in a situation of abundance, The purpose of the price mechanism is to allow individuals to recognise the opportunity cost of decisions: in a state of abundance, there is no such cost.

Which is to say that in situations where one need not economize, economics does not apply, e. g. areas with abundant fresh air and water.

So long as there is a limited supply, e. g. desirable land, economics does apply.