A raft of Swiss cantons are holding public referendums to abolish the tax deals for rich foreigners. On Sunday, Thurgau will vote on whether to scrap the deals. Another five cantons are set to hold similar referendums over the next few months.

La Gauche, Switzerland's left-wing party, has started a petition to abolish tax deals for rich foreigners across the whole country. The centre-left Social Democrats and the Green party have also come out in favour of abolition.