No the heart of democracy is that it is as fair as it can be.
Which means the minority has no say. That's the only way to play fair.
If it's pre-loaded so that one side is always in dominance than it's almost a dictatorship.
Indeed - so if any pair of two-bit planets is given the power to vote down a single world with trillions of people, it's not much of a democracy.
Again, members aren't sides. Members cannot fairly represent sides. Members are just... Dunno, useless figureheads. Okay, it's plausible for Vulcan to vote with one voice, because the people are religiously obligated to accept that logic reveals the single right solution to everything. But thankfully we haven't heard of any other member casting a single vote so far.