Comparing size without considering population will only lead to bad conclusions. Could you imagine someone claiming cancer deaths in Germany aren’t a problem because it doesn’t have near as many deaths as the US, it’s not even close? Sounds silly, right?
The US is reportedly 62nd in the world in libraries per capita. [1] Given the US has more wealth per capita than most of the world as well, I think claiming we underfund our public library system is fairly obvious.
[1] https://onlinegrad.syracuse.edu/blog/best-countries-book-lov...