The presumption that controls can be imposed temporarily, while an economy stabilizes, and then removed, gives insufficient recognition to the imbalances in an economy that emerge when controls are introduced. Removing controls subsequently creates its own set of problems, which most governments, inclined to impose controls in the first place, are therefore loathe to do.
Indeed, controls are often employed to avoid required -- but frequently politically difficult -- economic adjustments. There are many examples in history of controls imposed and removed, but rarely without great difficulty and cost. To be sure, any economy can operate with its borders closed to foreign investment.