just, democratic[...] government
Ok, I'll bite...
Just AND Democratic is nigh impossible. Masses have a tendency to create their own exclusion zone. We have a few centuries of classical greek and roman histories to illustrate the point of view of Democracy. More recently the USSR and other 'democratic' countries have shown how fast a democratic government can grow sour.
Also we live in a Republic, and not a place where "every voice counts". It's too easy to manipulate the masses in a democratic system, as the Game Theory that would allow a democratic world is unapplicable, the conditions being that all participant are fully informed AND take the most logical decision to maximise gains.
Just AND Government is also quite difficult to define, except if you consider 'Just' as meaning that the laws are applied the same to everybody, which in itself is a nice intellectual consideration.
Please remember that we do not have the BEST system, just one of the less bad...
Now a perfect democratic system is the Tyranny. One vote, that of the tyrant. All the rest are equals.
But then it might not be your preferred system ?