Well, I don't know about you, but I don't consider a world in which the government forces me to pay taxes to assist free-loading aliens to be a better world. Look, in my own game, Visions , I've tried to present a fully realized world with as much depth and diversity as our own. Because that's not what people would want for themselves. Neither was universal suffrage or integration or even daylight savings time. Yet few people would argue against the goodness of these things now.
People always fear novelty and they hate to change unless they're forced to do so.
You don't want to win people over to your viewpoint. You just want to force them at the point of a gun. You and I both know that's not true. Feudalism is necessary in Traveller because of the slowness of interstellar communications. It has nothing to do with a supposed preference of Marc Miller for autocracy.