WTF is up with Luxembourg on that graph?
It is a tax haven, with one of the highest GDP / person in the world, why is it, by magnitudes, the biggest recipient of EU largesse / person??!
Lots of people who work in Luxembourg don't live there so anything "per capita" is a bit misleading.
Additionally a lot of the EU's institutions are based there or have offices there, some of which might count as investments as well.
Lastly, everything there is really expensive. So you need to invest a larger amount to achieve the same thing as elsewhere.
Small population plus lots of EU institutions.
Lots of people who work in Luxembourg don't live there so anything "per capita" is a bit misleading.
Additionally a lot of the EU's institutions are based there or have offices there, some of which might count as investments as well.
Lastly, everything there is really expensive. So you need to invest a larger amount to achieve the same thing as elsewhere.