It’s how the country I live in, Switzerland, is organised, one of the most prosperous places on earth.

https://freedomhouse.org/country/switzerland

Could Switzerland's prosperity instead be linked to its historical role in safeguarding gold taken from Jewish victims during World War II, its tradition of banking secrecy that enabled dictators like Ferdinand Marcos, Mobutu Sese Seko, and Sani Abacha to conceal their assets, or its longstanding willingness to accept money from oligarchs avoiding sanctions, tax evaders, arms dealers, corrupt officials, drug traffickers, and fraudsters?

I don’t think these are core reasons why Switzerland is a prosperous nation, no. I would guess what you are pointing out has only benefitted a few select bankers and the average citizen has had little to gain from this.

I believe Switzerland is prospering because the citizens are in charge of their nation, not a select few belonging to the political class and well connected wealthy individuals.