Prisons can unexpectedly help develop local economies.

‌Prisons are usually tucked away in remote rural areas.
However, they help revitalize local markets because they need to purchase daily necessities for both inmates and staff.
They also help the local economy because families come to visit the inmates.
(Of course, by "local," I don't mean major provincial cities.)
(In the case of famous places like Cheongsong, it is said that the prison sustains the local economy.)