> Then I wait 10 years [for local productivity to increase, and then I can charge higher prices]

This is the only feature that's relevant. If productivity goes up, you can charge more. If it does not, you cannot.

You may do some corruption or some zoning or some whatever else you want, but at the end of the day, if productivity goes up you can charge more and if it does not you cannot charge more.

Hope that clarifies!