Maybe I have a local anomaly in egg prices, but I was picking those up for 37 cents/dozen all summer, then moved to a larger town (also in Iowa) and they moved up to about 60 cents/dozen.
This can't be explained just by purchase power differences. Considering the conditions even for Swiss free-range chickens aren't good, are they particularly terrible for chickens laying 5 cent eggs? I couldn't find any information (not even pricing) on the Aldi US site.
Also of note, this last summer was very very rough for chicken production. Prices were very low compared to input costs, and chicken farmers were losing their shirts. Chicken renderers (mass killing of chickens when the price drops too much) were backed up for many weeks.
Caging has been illegal in Switzerland since 1992, that probably makes part of the price difference. So egg collection can be automated easily in a U.S. process (in states where cages are legal) but is harder to automate here. I would guess they still use nest boxes so there could theoretically be an automatic method from the nest box to a conveyor belt. I'll research if Switzerland hand-collects things, then the wage difference of whoever does that plus vastly more expensive land could explain the rest of the price.
EU eggs seem a lot safer. Refrigerating eggs seems very strange.