The data leak which alleges the bank Credit Suisse has been running accounts for criminals and corrupt politicians has triggered a firestorm of arguments in Bern.
Left wing parties in parliament are calling for money laundering laws to be strengthened and more power being given to regulators to fine banks if they don’t carry out sufficient checks.
There are also calls to change the law which allows journalists to be criminalised if they publish stolen bank data.
But on the other side of the divide, some say the media reports are too emotional and ignore the actions of other countries.
The head of the Swiss Bankers Association, Jürg Gasser, says the United States doesn’t share tax data and France and Germany are fighting for tax revenue after a drop following Brexit.
The Swiss Financial Market Authority and federal prosecutors say they note the media reports – but are not commenting further. The State Secretariat for International Finance says this country meets all international laws on exchanging tax data and fighting money laundering and criminal financing.