Earlier quoted context omitted.
It's not completely irrational. It's a fixed placative number yes. But reality is also we don't produce more food than we already do. More people means more import and it's actually lowering the quality of the available food, making shopping more complicated, etc. And that's just the food quality aspect, what about pensions? Health care? ...
Most of food is imported anyway, Switzerland is a very small country. This is a very silly argument, I'm sorry, it does not make any sense. "making shopping more complicated" what does that even mean. What about pensions? We are talking about foreigners working and paying taxes in Switzerland, a lot of them in very specialized jobs. Health care? A lot of doctors and nurses are foreigners, too. But apart from all thes…
Familien nachzug is a thing where people can get their elderly parents (or anyone family really) to move to Switzerland a lot more easily. This can indeed add additional costs to the pension and health care system.
The implications with the EU surely could be problematic.