While I recognise that they are a thing that exists (and this is not something you can change), you appear to claim: A. To understand how the "modern economy"

While I recognise that they are a thing that exists (and this is not something you can change), you appear to claim: A. To understand how the "modern economy" works B. It cannot work without one system Both claims are very big claims, and while they could be true they are nowhere near so obvious that you can say that it belies an "immense ignorance" to think that this system is bad.