> Systemic changes need to originate somewhere, right?

Yes, but that does not need to be morals, values, ethics or ideology.

Instead I prefer Kant´s idea of the categorical imperative whereby the question only is if a society following specific rules would satisfy its members long term. It is more pragmatic as it shifts the question from should/shouldn't to does it work out.

LVT satisfies the categorical imperative. If I didn't know whether I'd be born as a landless serf (very high chance) or born to inherit wealth (low chance), then I should prefer to be born into a society with an LVT, since the LVT distributes the land rent to everyone.

> they've come to the conclusion that the current system is unjust

you want a dictatorship? that's how you get a dictatorship.

I am not going to speak for others, but one can argue for LVT as a more functional system

https://www.astralcodexten.com/p/does-georgism-work-is-land-...