Honestly I don't know import statistics but the majority of food I eat is from Switzerland. A lot of imported products are complicated because they often contain more weird stuff like artificial colouring, sweeteners or thickening stuff.

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.