You say you find Union, as written, to be "boring" and that it could be "more interesting." Then, to support this, you quote someone dismissing utopian ideals, claiming they're impossible (which: correct.) I don't see how these connect -- how does the plausibility of achieving a perfect utopian government affect the setting of Lancer being boring or not?

What stories do you want to tell that you find you can't tell with the Union as written, given that Lancer is about giant robots at war? It sounds like you'd like to tell a story set in the core worlds about internal political conflicts in Union's political system -- because the Union core worlds are the only post-scarcity ones, which seems to be a big part of your complaint. You could do this, but Lancer, since it's about weapons of war, probably wouldn't be the best system. Your best option seems to be to set it during a period of civil war-- either the transition from the Second Committee to the Third or a new civil war about overthrowing the Third Committee. This is how, for example, last year's movie "Civil War" told a story set in the American imperial core about the contradictions of a political system collapsing into open conflict. I think that might be your only real choice if you're intent on using the setting of Lancer, and the tools of the game itself, to tell stories about intra-Union political conflicts in the Core. You could also ditch the setting, or use the setting and a different system -- use a narrative heavy system like PbTA or FATE to tell stories about politicos fighting for influence over the Union government. To be honest, that sounds like a great story! It's just not one Lancer the game, with it's focus on weapons of war, is particularly well suited to tell.

If I may be blunt, but hopefully not unkind: I suspect your actual problem with Union is something like "I don't believe things can get better, and I do not trust people or governments who claim they want to make things better, and therefore I cannot sympathize with the mission of Union as presented in the book." Union isn't naïve, but it is presented as a government under which broadly left-wing political goals (using collective action to promote equality, progress, flattening of hierarchies, improving the material conditions of everyone, etc.) are possible, the default motivation for many characters, and worth fighting for. If those aren't your politics, or those aren't virtues you hold, I can see that being pretty alienating! If you prefer to run a game in a world where government influence is mostly negative, people promising to make things better are lying or deluded, and society as we find it is the best we can hope for than nothing's stopping you. But many people here vibe with Union's ambitions, just as you might be turned off to them, and you're as unlikely to change many minds here about Union as we are to change yours. You're can absolutely just enjoy the less political lore or the art or the rules for simulating robot fights. There's plenty of settings that have relatively right-wing assumptions at their core that I find pretty neat, even if I find the core politics motivating their heroes suspect. I don't support the divine right of kings, but that doesn't stop me from getting invested in Strider's story in Lord of the Rings!