A quote from Robert Heinlein:
Throughout history, poverty is the normal condition of man. Advances which permit this norm to be exceeded — here and there, now and then — are the work of an extremely small minority, frequently despised, often condemned, and almost always opposed by all right-thinking people. Whenever this tiny minority is kept from creating, or (as sometimes happens) is driven out of a society, the people then slip back into abject poverty.
This is known as “bad luck.”
Related: Post-tax-increase, the exodus from Illinois begins.
Also: America’s Dying Cities: “In several dozen cities nationwide, the population actually declined significantly as residents presumably began to flee the region’s toxic financial atmosphere, or perhaps in some cases, even held off on having kids due to a lack of resources.”