If you can't achieve your utopia at the local level how are you going to do it planet wide?
As for your characterization; yeah, I don't think any singular country is a one stop charity, nor are its people obligated to at the point of a gun be charitable to the whole planet. I don't believe the money I work for is for everyone on earth, It is for the people I love first, my life is for them before anyone and before any stranger.
Second, ALL GOVERNMENTS become oligarchical, that is the
Iron Law of Oligarchy. And as for "Muh Technocracy" I've never had anyone respond to my positions with a case against it. Your position I guess is "These people are obviously morally good and its
unpossible that anything bad could happen!" it is essentially a magical thinking of "Credentials = Morally Good or Trustworthy". Also Technocracy is always a tool of the powerful, a means of enacting punitive policies on the masses that would be rejected democratically. Technocrats exist to bully the lower classes on behalf of powerful benefactors.
And finally, you admit your core position is Capitalist. At least we can stop with the pretensions of being some bleeding heart socialist. Solidarity? Who needs it! Cheap coffee and consumer good please! Pfffftttt. No Wonder Labour went down in flames.