On 15 November 2019, initiators around Prof. Dr. Marc Chesney and former Federal Council spokesman Oswald Sigg announced to the media that a collection of signatures for a popular initiative for a "micro-tax" would start in January 2020.
The tax should automatically cover cashless payment transactions at a uniform tax rate in the per mil range and should replace the three federal taxes, namely value added tax, direct federal tax and stamp duty (see https://mikrosteuer.ch/de/die-initiative/in-kuerze/).
In the media landscape, negative comments have already appeared (cf. e.g. the NZZ commentary of 16 November 2019).
The website of the initiators is available here.