"As it is now, I live as I please, and I fancy very few courtiers, however splendid, can say that." (1.13)
Hythloday explains why being under someone else's authority is an automatic downer, not to mention a total power depleter. But wait a second, is that pride we hear in his voice? Uh oh.
[Cardinal Morton] was a man, my dear Peter. [...] as much respected for his wisdom and virtue as for his authority. (1.15)
Cardinal Morton, you're a solid guy. Notice how Hythloday goes out of his way to mention not only Morton's authority, but also his wisdom and virtue. This might be a kind of philosophical trinity for our speaker.
[B]y secret ballot [Utopian officials] elect the prince from among four men nominated by the people of the four sections of the city. The prince holds office for life, unless he is suspected of aiming at tyranny. (1.49)
While it's clear that Hythloday really wants to emphasize the fairness of the Utopian political system, it's not so clear what "aiming at tyranny" exactly looks like. Why doesn't Hythloday give us the deets? Because it has never happened? Or maybe because the European readers already know what it looks like?
[The Utopians] do not understand why a dunderhead with no more brains than a post, and who is about as lewd as he is foolish, should command a great many wise and good people, simply because he happens to have a big pile of gold (2.65)
Moral of the story: rich people are dunderheads. Oh wait, no. Actual moral of the story: wealth shouldn't be the basis of power.
Any such laws, when properly promulgated by a good king, or ratified by a people free of force and fraud, should be observed. (2.70)
Mark your calendars! Hythloday is saying something positive about a legal system! He argues that when power comes from a legitimate source, it can actually regulate things to our benefit.
The institutions [the Utopians] have adopted have made their community most happy and, as far as anyone can tell, capable of lasting forever [...] As long as they preserve harmony at home, and keep their institutions healthy, the Utopians can never be overcome or even shaken by their envious neighbors (2.110)
In a stirring conclusion, Hythloday links a country's power to the happiness of its subjects. Even in political philosophy, that's not always something people connect.