You can't just compare GDP spendings and call it efficiency without accounting for the output.
Does the USA educate the same fraction of their population as Sweden? Otherwise it's comparing apples to pears.
Not that efficiency is the top priority in my book, but sure, it's not an unimportant metric by any means.
edit: ... am I being Poe's lawed here?
I wouldn't trust a guy letting their battery go that low either