I'm no expert, but I've been reading Brett Deveraux's blog recently, and he argues that armies built from a civilian society frequently outperform expectations through history.
The other thing he argues that people overestimate is the effectiveness of hugely powerful weapons and technology. They generally don't degrade civilian morale enough to get them to surrender, and well prepared defensive positions are incredibly hard to render defenseless, even with modern weapons and seriously destructive bombing.
I don't think that it's necessary at the moment, but these decisions are a risk/reward thing, and I think the Swiss are prepared enough to make the pain of invading Switzerland outweigh the relatively small gain.
The other thing he argues that people overestimate is the effectiveness of hugely powerful weapons and technology. They generally don't degrade civilian morale enough to get them to surrender, and well prepared defensive positions are incredibly hard to render defenseless, even with modern weapons and seriously destructive bombing.
I don't think that it's necessary at the moment, but these decisions are a risk/reward thing, and I think the Swiss are prepared enough to make the pain of invading Switzerland outweigh the relatively small gain.