I agree that UBI needs to replace socialism. But I also think it's naive to deny what motivates socialism. Wealth is too concentrated at the top. Even Milei will fail because the current model has failed.
I think Milei's only solution is going to be UBI for example (https://citizenlocke.substack.com/p/why-mileis-only-solution-will-be).
Something like UBI, Swiss democracy (direct democracy), Bitcoin. This stuff can work for everyone, left and right, rich and poor.
I believe this is the kind of systems that will make the nation state better in the long term.
Just saying socialism is bad is not going to be enough again... The masses will want change. And the masses are much more than the elites.