Whose judging by a single person? you can judge the legion as evil, murdering, slaving SOB's without ever meeting its leader. And while the NCR may have people willing to break the rules against torture. The legion doesn't even pretend to have rules against brutality. There is at least hope for the NCR to get better.
Unless your a woman. So please give me the argument for why slavery and treating women as breeding stock is good. Oh and if possible give that argument to your mother or girlfriend and see how they react.
As Marcus says the legion follow Caesar not his ideals, when he dies be it via the Courier, old age, or cancer. The legion would crumble from infighting. House says something similar if you kill Caesar. One thing is clear Caesar is retraining the legion. The blood bath the legion causes is nothing compared to what it does if the Legate is in command.
Which is exactly the problem the legion can't survive much beyond Caesar. Its simply a giant band of raiders held together by a charismatic leader. Caesar is just a bully who crushes you if you don't agree with him.
So there is no long term or shot term for the Mojave.
I suppose I should have been more clear, you CAN judge a nation by its leader. You can't by its lieutenant. The one I was referring to was the Nipton burning one.
Even if one doesn't agree with Ceaser, one will have to concede that he has managed to TRULY unify the Legion. Large amounts of time and energy are spent on removing all aspects of a tribe's former identity to ensure their cooperation.
Assuming the Couriers support, as he has been placed in the position of deciding power, the Legion would likely deal with matters without falling apart. Ceaser is intelligent enough to realize the importance of finding an heir or at least a secure line of succession. I feel confident in saying that the Legate will never be in command. He is a military man, not a leader. He would be bypassed or assassinated before any of the other generals allow him the position. Ceaser is a bully who crushes all who oppose him. He does not have the moral high ground. I concede this much joyfully. But, he does stand the best chance of keeping mankind alive and unified.
As to enslavement, it is needed. Their economy requires their male work force to fight to support and defend their nation. It is not morally sound, but it is economically. There is no threat of a slave rebellion (Who are cowed into submission better than raiders (Who stopped coming a long time ago)). After the war, and possibly Ceaser's death depending on his position on slavery, it will likely end. Most of his generals who stand a fair chance at succession aren't thrilled with the prospect to begin with. It is a temporary necessary evil. And who I am willing to argue that to (for the record, I will gleefully argue any side of any debate to anyone) has no affect on the validity of my argument.
I just want to chip in the fact that NCR aint "laboring to hold its head above water". NCR is actually at war with BoS based in Northern Californian, Arizona with whatever was fight the Legion as well.
Fact is, from in game dialogs, NCR homeland is depict to be quite wealthly, enough for them to enjoy corporate scheme and political bickering.
Its outlying areas are, which house the bulk of its military. If they collapse or rebel then it will leave either huge swaths of land vulnerable to attack from rivals, see the rise of mini-nations attacking for independence against an entity with no foreseeable means to defend itself or at the very least crippling their economy and its already burgeoning military putting them back in line. Cue attack and... bye bye NCR.
Wealthy at the cost of alienating and inducing mass poverty to outlying areas. Corporate scheme and political bickering aren't exclusive to rich nations either, politics works a lot like school drama, rarely is it ever left behind, it just get a new name.