>>215
The cool thing about free borders is that you can see the effects in a single lifetime. The monarch would also find his expenses growing ludicrously if he maintained open borders with all the appropriate attractors (welfare, legal representation, public infrastructure).
I'm also not seeing how usury is needed to generate economic wealth. Usury as it functions now provides literally zero economic benefit to anyone, unless they are a central banker. Money being merely a measure of value means that ceteris perebus, one nation printing and charging interest and another nation printing and charging no interest would see no difference overall economic value. In fact, the nation that does not charge interest will not see bubbles forming everywhere like some kind of sick economic abomination, meaning that overall they will see more correctly allocated resources.
In terms of raw cash, they will be poorer, but in terms of raw value, they would be better off.