I didn’t click around enough to see the data sources. I presume that’s Japan up there on the left. I’d not seen this before, so I’m suspicious. Also, given how hard it is to pull a meaningful average out of a highly skewed distribution, like the wealth distribution, I’m always a bit uncertain what to make of a concept like GDP per capita. For example, there are huge number of people in the US who make less than 10K/year.
If this was all you knew, and you want’d to raise GDP you’d start by addressing inequality.