Not to mention it's a LOT of work that needs to be coordinated by someone with the vision and skill to make it happen. People like that are not exactly common in the public administration of any country.
Mostly because government and small-scale enterprise balk at the salaries they command.
Income inequality is a concern, and some people are certainly overpaid. But at the C* or technical architect level, the cost of pinching pennies is dominated by the cost of choosing a wrong direction (or not recognizing a changing situation and correcting quickly enough).
Public sector salaries are simply set a certain way - through a political process, covering all employees. There is little leeway to give higher/lower salaries to a few as that smells like cronyism. You can't negotiate a gov salary, except for externals.
