At the link below, you can see countries have a huge difference in ratios of tax revenue to GDP. Is it fair to assume that a higher ratio is better? Does raising a substantial portion of your GDP in taxes mean that your country is more or less financially stable?
I see that Algeria is #1 worldwide at 63%, while UAE is the lowest at 1.4%. I assume this is because the UAE has a huge GDP from oil (and thus taxes don't play a big role in its GDP) and because Algeria has a tiny GDP (and thus, a fairly-efficient tax system results in a fairly high ratio).