WA-MMT King Bill Mitchell explains that "THE IMPOSITION OF TAXES BY DESIGN CREATES UNEMPLOYMENT IN THE NON-GOVERNMENT SECTOR".
Government spending provides revenue to the non-government sector which then allows them to extinguish their taxation liabilities. So the funds necessary to pay the tax liabilities are provided to the non-government sector by government spending. It follows that the imposition of the taxation liability creates a demand for the government currency in the non-government sector which allows the government to pursue its economic and social policy program.
This insight allows us to see another dimension of taxation which is lost in mainstream analysis. Given that the non-government sector requires fiat currency to pay its taxation liabilities, in the first instance, the imposition of taxes (without a concomitant injection of spending) by design creates unemployment (people seeking paid work) in the non-government sector. The unemployed or idle non-government resources can then be utilised through demand injections via government spending which amounts to a transfer of real goods and services from the non-government to the government sector. In turn, this transfer facilitates the government’s socio-economics program. While real resources are transferred from the non-government sector in the form of goods and services that are purchased by government, the motivation to supply these resources is sourced back to the need to acquire fiat currency to extinguish the tax liabilities.
Further, while real resources are transferred, the taxation provides no additional financial capacity to the government of issue. Conceptualising the relationship between the government and non-government sectors in this way makes it clear that it is government spending that provides the paid work which eliminates the unemployment created by the taxes.