Your argument is that this proposition is valid notwithstanding the very real power struggle in society. Why would one want to even put someone through something as humiliating as an intelligence test to determine their rights. It reminds me of the reading tests during segregation to suppress black voters. If we would have implemented this test then, tell me would they have a fair chance in society?
At least from my perspective, the government is fair game for everyone. Already our best and brightest are working for us, however power is incredibly corrupting. The issue isn't the voter, it's the system that seeks to suppress and deny the will of the voter. The voter should have full responsibility, just like someone who decides to take unsanctioned drugs