As a note on this older post btw:
David Benton wrote: ↑Sat Jul 20, 2019 8:58 pm
Are Germany and Italy not chipping in ? The main benefit of the Tunnels is to them, I think. I.E , traffic that passes through Switzerland.
Both the Gotthard Base Tunnel and Lötschberg Base Tunnel are a contractual obligation Switzerland agreed to mandated by the 1992 Agreement between the European Economic Community and the Swiss Confederation on the Carriage of Goods by Road and Rail
That treaty basically established the reciprocal basis of mutual transport access between Switzerland and the European Union, as a step towards allowing Switzerland access to the European Economic Area, and as the price for that established certain investments that Switzerland had to make - mostly those two tunnels and a certain guaranteed amount of trains and goods ("consignments" transited even before that starting in 1994.
To be fair this treaty was rushed through negotiations and signed only two weeks (!) after the Swiss in a referendum rejected joining the European Union - the Swiss government was kinda in a hurry after that to at least get economic access. It is rather ... favourable to the EU, altogether, especially since where it mandates similar future infrastructure investments on the EU side those are far more vague in language ("shall increase capacity on route..." and similar).
Competing projects such as the Brenner Base Tunnel or the TELT Turin - Lyon tunnel which only run on EU territory are 40% cofinanced by the EU.