It all depends on what is being created or repressed. The ethical evaluation is independent of which kind of power it is. That's why it's so important for there to be clarity on one' s ethical vision - a point which too many poststructuralist thinkers neglect. But one does not solve the ethical problem by positing a good human nature and then saying that it should be allowed to flourish. One cannot rest one's ethical judgments on human nature, but instead must develop the socially given ethical networks within which our lives unfold.
Most political philosophies seem incapable of passing into programmatics and then back again.
The tension between the world as it exists and what we envision is most often destroyed by consolidation of power by one idea or political party. That said, your question still remains, since one can wonder what happens to political philosophy when a programmatics is carried out. As far as who is to construct the program, it is certainly not to be philosophers. This idea is, I hope, no longer taken seriously, even by philosophers. The only response as to who IS to construct the program, or at least have input into its construction, is that it is those who are affected by the current situation and the proposed changes.