I agree with your view of what the realities are. But I don't see why should applaud them: What happens if a country like Switzerland or Singapore has a sustainable competitive advantage over the USA or Germany, that simply cannot be overcome? They can achieve some efficiencies by "freeloading" that bigger countries cannot match, for example Switzerland doesn't train enough doctors at their own universities but relies heavily on hiring doctors from Germany.

If companies cannot compete, in the long term they goe bankrupt and disappear. But how would a country disappear? It's not like every citizen could simply move somewhere else.

Also the correlation/causality is not entirely clear to me. Possibly countries are more succesful, because they have lower taxes. But at some point it could also be true that only countries that are already succesful are able to lower their rax rates so much.