Can we? Do we even know the counterfactual? Perhaps Norway would have been 2x richer (incl. their poorest people) if they implemented ultra aggressive libertarian policies.
The best we can do is learn from natural expriments like Finland and Estonia being about as rich before ww2, then by 90s the gap got massive since one was forced adopt more redistributive policies. Same with North / South Korea. Here we have at least some hope of extracting causality
Exactly, and thankfully those have been made based on natural experiments like the ones I shared. And the consensus among serious modern economists (not those making money on selling popular books) is that redistribution negatively affects economic growth with all else being equal
I would agree with your statement regarding politics that rests solely on wealth distribution of the populist kind. Wealth needs to be created so that one has something to add to everyone's bag.
And I agree that _some_ redistribution is necessary for a healthy society. But the cost of slowing growth must be weighted agaist it. And populist calls for "no billionaires" etc are going to be bad for all, including the poor, in the end