People always come up with this population-size argument in contexts where it's totally irrelevant[1]. So what if Germany has eight times more residents than Sweden, or Sweden eight times fewer than Germany?!? Everything still works the same, only scaled up or down by a factor of eight: You have eight times more/fewer consumers to supply (with energy, staplers, food, whatever), but you also have eight times more/fewer entrepreneurs and workers to supply it.

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[1]: This moronic argument is most frequently brought up as "Single-payer health care can't work in the US as it does in [insert any country with single-payer health care], because the US population is [X] times bigger!" Yeah, but so fucking WHAT? That just means the US has X times more health care recipients, and an X times larger economy to supply health care! It's just the same thing, scaled up by a factor of X. Sheesh...