Madrid, Amman, Naypyitaw, Brasilia, Washington...history is replete with examples of governments who wanted to move out of unruly urban centers and start with a "clean slate".
The https://en.wikipedia.org/wiki/Pennsylvania_Mutiny_of_1783 is specifically what convinced Congress that the capitol building needed to be moved to an isolated area not in an existing city.
[0] https://en.wikipedia.org/wiki/Burning_of_the_Parliament_Buil...