How does the real-world purchasing power of a government salary fluctuate based on geography?

Answer

A salary in a low COL area can be very comfortable, while in high-COL metropolitan areas, it might feel restrictive

The actual value of a fixed government salary must be evaluated against local economic conditions, meaning the same nominal pay has significantly different purchasing power depending on the cost of living in that specific location.

How does the real-world purchasing power of a government salary fluctuate based on geography?
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