Election based democracy uses popular consensus as the mechanism to distribute power. In order to be successful in politics, it is necessary to represent popular opinion (or cheat, let's not have any Bush examples).
I can see three possible ways of representing popular opinion:
1. Your values are already the same as >50% of the population
2. You are able to shift popular opinion to your own
3. You are able to act as if your values were theirs
You don't agree that Fe is much better suited to the second option?
And beyond that, you don't agree that NTJs are incredibly unlikely to possess a position readily adoptable by the public?
It's not jaded of me to accept that a career in politics necessitates the omission of some personal values and often the adoption of external values so long as popular vote is the law.
Interesting analysis quiet clever. Nevertheless, INTJ don't need to go through the election process to have power. They do one better and control the elected puppet.
Also for some reason they do quiet well maintaining there role when elected/appointed to a judicial branch.
"How dreadful!" cried Lord Henry. "I can stand brute force, but brute reason is quite unbearable. There is something unfair about its use. It is hitting below the intellect." ~ Oscar Wilde - The picture of Dorian Gray