@David Mo
Well, point 2 is where you start to go into gaga land already.
The problem is that just because both have "moral" as an adjective, doesn't mean that any serious theory of morality hinges on appointing moral blame. In fact no serious school of moral philosophy depends on that at all. They all actually deal with what is best for everyone, or at least for the largest number of people.
As a self-proclaimed philosopher that is something you should know.
E.g., since you proclaimed yourself to favour intersubjectivism in another thread -- never mind that then you actually argued AGAINST actual intersubjectivism -- the focus there is basically optimizing that most people get as much of what they actually want (e.g., not being murdered), in as much as possible. Apportioning blame is NOT a part of the optimization problem there. It's not even a factor.
Neither is the requirement that people's decisions are random or anything. IF things are deterministic, it just makes the optimization problem easier.
Which incidentally is also something that has no reason to change, regardless of how one believes that decisions are taken. You just pull out of the butt the postulate that then suddenly it would become about personal usefulness for one person, i.e., basically just everyone becoming an amoral sociopath. But you have presented no reason why for example utilitarianists would suddenly give up on the consideration of what's best for the largest number of people and just go full tilt sociopath just because they can't point fingers at someone. It's not the apportioning blame that they're trying to maximize, silly.
Hell, even proponents of State Consequentialism, which seem the most in line with the considerations you propose -- i.e., determinist consequences for the state -- didn't manage to come up with the nonsense idea that then they should just gas the mentally retarded if they can't blame someone.
But generally, I think point 2 and the other thread give me the idea of what got you into gaga land with that thought process: in the other thread you were hammering on -- and rationalizing around -- maximizing freedom as the only criterion. Or at least the main one.
Point 2 seems to just be saying that if you can't work on that one variable, then you're packing your toys and slamming the door behind you. *AHEM* I mean basically giving up on morals altogether.
But the problem is that that's just YOU and your own misunderstanding of morals.
Even the rest of intersubjectivism can still concern themselves with the actual things that other people want, same as it always did. Such as staying alive, for example. Virtually nobody else will do the brainfart that if they can't maximize the one variable they unilaterally proclaimed to be the only one that matters, then they'll give up on the whole optimization problem. Or at least nobody who actually understands how multi-variable optimizations actually work.
And it's based on your own equivocation of "freedom" at that. Because you're equivocating between the "freedom" as in, whether someone is forcing you to do something, and "freedom" as in you whatever constraints are in your own head when you take a decision. And not only they're not the same thing, but most of the time they're actually at odds with each other. Most people are actually quite able to distinguish between the two.
Point 3 though gets an honourable mention for pencils-up-the-nose underpants-on-head stupidity too. Mainly because it's already been pointed out to you that that's not a given, and just repeating it one more time won't magically make it true. Yet instead of supporting it, what do you do? Yeah, repeat it as a bare postulate one more time
AGAIN, the wellbeing of a country depends on a lot more factors than saving a few bucks on caring for literally 0.001% of its citizens. Which, one sigma for IQ being defined as 15 points, is literally how many are below the threshold of 35 IQ, i.e., worse than moderate retardation. It's not some hyperbole number, it's literally what the maths works out to for 34 IQ or lower.
In fact, if it helps with the morale, national unity, etc, of the other 99.999% of your citizens, giving some help to the 0.001% is probably the best bang per buck you can get in government investments. Even if you gave each of them a full time personal nurse, that's using another 0.001% of the population to keep the other 99.998% happier and more productive.