As long as America has an outsized impact on the rest of the world economically, socially, militarily, resource consumption wise, people in countries likely to be impacted have a voice.
They can't vote, so what's your problem with whatever they choose to worry about?
Let us worry about America and you worry about Australia.
JimLur, if you, and others of your political persuasion, were more realistic and rational about matters such as inequality and tent cities in America then i wouldn't be as concerned about the future of a country in which i have family as i am.