I live in Switzerland myself and have first hand experience in several cantons for and with clients; among others
Zug, Zurich, Lucerne, Geneva and St Gallen. It isn't as beautiful as it seems anymore. Lots of hidden costs. Tax on worldwide income. A favourable wealth tax nevertheless. Local taxes on income seem nice until you find out all the little extras, for instance being married is more expensive tax wise. Lets not even talk about when there are kids. 3000 per month per kid is normal. Nannies are a little cheaper however not even that much. So I call your 400k bs. Perhaps you are stuck in old beliefs?