"The Party seeks power entirely for its own sake. We are not interested in the good of others; we are interested solely in power. Not wealth or luxury or long life or happiness: only power, pure power.
-George Orwell, 1984
From the perspective of having power within the Party, submissiveness and compliance equal power. If one complies with the principle of doublethink and one accepts the Party and Big Brother as the ultimate ruler while still maintaining a certain mid-level intelligence one may rise in Party ranks.
In the other sense of the word, power is scarce. The Inner Party has the most power, mostly because they have the most knowledge of what is happening and why. Members of the outer Party, I would say actually have less power than the proles. Because the proles have significantly less surveillance than The Outer Party, they have the power to rebel against Big Brother if it occurred to them to do so. It would be extremely difficult for a member of The Inner Party to incite a rebellion without being caught by The Thought Police. From this perspective, knowledge and determination are synonymous with power.