I mean, even though USD is a popular currency: does the PPP hold up in Switzerland? The thing is that, despite having $10,000 (CHF 7905) in their budget, that still won’t cut it since there is a bottle of liquor that costs CHF 100,000 ($126,755) for example.
Don’t even mention restaurant prices, it’s ridiculous that buying from the supermarket is cheaper. Have you been there? If so, is it even a wonderful country to visit despite how expensive it is for tourists? (Explains why barely anyone goes there).
As a German, I spent several weeks in Switzerland hiking in the mountains with a backpack and a tent. You can absolutely travel on a budget there if you’re fine with that simple lifestyle and you bring your own equipment. I don’t think my daily budget was more than 20 CHF per person a day. If you shop minimalistic (lentils, couscous, pasta etc.) I’m sure you can go even below 5 CHF.