Naturally it isn't. But those other countries maintain their roads, schools etc. etc. without taxing non-residents on their financial affairs in other countries. The main point is the difference between how the US handles the tax issue vs. almost all other countries.
Now you mention it, renouncing citizenship seems relatively costly compared to e.g. the UK, though I have no idea what the average cost is for renunciation. Perhaps the UK is abnormally cheap! (EDIT: Should probably have pointed out that it's currently £144, or about $215.)
It would seem a shame if people felt they needed to renounce citizenship to avoid hassle/tax. Of course, some may argue that if they want to renounce at all, then perhaps they're not committed enough anyway, but I wouldn't argue that.
Now you mention it, renouncing citizenship seems relatively costly compared to e.g. the UK, though I have no idea what the average cost is for renunciation. Perhaps the UK is abnormally cheap! (EDIT: Should probably have pointed out that it's currently £144, or about $215.)
It would seem a shame if people felt they needed to renounce citizenship to avoid hassle/tax. Of course, some may argue that if they want to renounce at all, then perhaps they're not committed enough anyway, but I wouldn't argue that.