For normal people, the fee for non-residents would be something like 50chf a month. For americans, I imagine it would be way more to comply with the US banking secrecy laws.
I agree with your first point, but it's not the main reason why US was attacked - even if it was 100% isolationist, it would have been attacked anyway, because Japan can't really fulfill its imperial ambitions, if they have the US pacific fleet in its backside.
I mean, if you had money at the time and bought a house in one of the larger cities or their suburbs, you would probably be loaded by now, even though you would regret it for about 5 years after the crash
Well it's simply not true, doeners are 10-15, and meals in sitdown restaurants are 12-25. I live in Zurich, restaurants are slightly cheaper than in the US ( plus there is no tip or extra tax, what you see on the menu is what you pay) - but there are less budget options available.
For normal people, the fee for non-residents would be something like 50chf a month. For americans, I imagine it would be way more to comply with the US banking secrecy laws.