Most of the European microstates are not tax heavens and never were. Switzerland is in the process of being destroyed economically and "forcefully" annexed into the union, as all its exports have to be compliant with EU regulations even though they have no influence over it currently. Short version, they are dumb. The huge pressure they got from the union and the US has lead to actual results, as Switzerland is not really a tax heaven anymore. Also, the main idea and value behind Switzerland, being a land of peace and neutrality, taking advantage of constant european warfare, has no meaning anymore.