The problem is that if the elected government is weak, ineffective and isn't fulfilling its core roles, then other people and organizations would take on these roles and the associated power and decisionmaking - and those emergent de facto replacement "governments" are likely to be even more illiberal, oppressive mini-dictatorships that are not elected or accountable to the general society. That's how you get the origins of Cosa Nostra, or the cartel-governed zones in Mexico, or de-facto rule by corporations in the fictional cyberpunk dystopias.