Democratic accountability is an elusive term to quantify. Governments are about thousands of decisions. How do voters weigh the quantity and quality of all these decisions to cast a wise vote?
As well, most of these decisions are handled by the bureaucracy. Bureaucracies have an institution history to them. Whether they are run well or not run well may have roots from decades ago. And those politicians are long gone.
In other words, I think 'accountability" and "transparency" are just buzzwords for political rhetoric.
I have invented a different kind of democracy. I o not suggest this system will be accountable and transparent. But it will be more trustworthy.