Geneva is the densest city in Switzerland, and not even in the top 10 in Europe, or top 100 in the world. They've got room.

I've spent some time in Switzerland. There is a TON of space that is suitable for habitation that either isn't used or is used for farming (necessarily). I remember traveling around thinking how empty it felt outside of cities. Even the cities didn't feel crowded compared to other cities I've been to.

A) Your 1% hypothetical would be making the population 10x higher than now, so obviously they could not handle having the 1%. It's a dumb hypothetical.

B) Assuming we go with your hypothetical, each person of that 80 million people in 16,000 sqmi would get 5600 sqft. My entire property, regardless of my house size, is not 5600 sqft. So I wouldn't feel bad about that much space. Yeah, much of the mountainous areas are not habitable, but that's why multilevel housing was developed. If we assume only 25% of their country is habitable, then that still gives each person of that 80 million person around 1400 sqft. That's bigger than my 3br house! If we go multilevel housing, then you can still have a ton of space for people.

1% of the world population is more than 80 million. Them being rich or not isn't what matters, how the resources are divided is the problem. There is enough space also in Switzerland for many more people but not if all of them are poor and uneducated, nor if all of them are surgeons and lawyers, nor if they all want to start a free roam chicken farm. More equality leads to more perceived space, because low equality leads to people living in small houses in dense cities. But if you're not from Switzerland it might not really matter what argument i bring up.