If by necessary you mean “in demand”, then yes I agree, otherwise I don’t know what you mean. You need to look at what products have unmet demand if you think the market’s being prevented from reaching full employment. But examining supply chains from the ground up isn’t a requirement for this, and actually no one understands the economy that well as it’s computationally impossible. So we look at intermediate simplified components of the supply chain and at demand itself. There are times when looking at an extremely detailed picture is necessary, but I don’t think that’s always so.
Two exceptions to this:
Governments can employ people to do jobs that aren’t demanded by the market but help society.
There might not be enough resources for people to do any work that’s in demand. To look at a small example, if I am a farmer in a developing country and foreign food imports are priced lower than what my costs are, I will probably not be a farmer for much longer.
If by necessary you mean “in demand”, then yes I agree, otherwise I don’t know what you mean. You need to look at what products have unmet demand if you think the market’s being prevented from reaching full employment. But examining supply chains from the ground up isn’t a requirement for this, and actually no one understands the economy that well as it’s computationally impossible. So we look at intermediate simplified components of the supply chain and at demand itself. There are times when looking at an extremely detailed picture is necessary, but I don’t think that’s always so.
Two exceptions to this:
Governments can employ people to do jobs that aren’t demanded by the market but help society.
There might not be enough resources for people to do any work that’s in demand. To look at a small example, if I am a farmer in a developing country and foreign food imports are priced lower than what my costs are, I will probably not be a farmer for much longer.