Luxembourg has serious issues too that that metric hides, I've looked into it since I qualify for Luxembourgish citizenship and while that would let me live anywhere in the EU it's probably good to actually live in the country on my passport for a bit - I'd only do it if I won the lottery lol.

What that metric is hiding is the fact that a lot of the people who actually do the low wage work in Luxembourg live in France and Germany and commute in for work every day. So France and Germany take the hit for Luxembourg's economic policies around service industry work.