Trying to switch systems peacefully without losing total control of a country is not an easy feat.
Even countries that managed to do that like Germany's unification, Portugal (Carnation Revolution), Greece (military junta fall) or Spain ended up with regrets and damage that takes generations to cure.
Germany's unification? A huge mess and the damage is ongoing. Kohl bought votes by setting Ostmark exchange rates to 1:1. This took on all debt of the GDR at full price but got him favour with veryone with money in the bank. He enriched his cronies by selling companies and banks with credits in billions (taxpayer backed) for peanuts. He promised them "Blooming Landscapes" but they got sold out big time. What is blooming there? Fascism.
Trying to switch systems peacefully without losing total control of a country is not an easy feat.
Even countries that managed to do that like Germany's unification, Portugal (Carnation Revolution), Greece (military junta fall) or Spain ended up with regrets and damage that takes generations to cure.