Maybe everyone here makes 6 figure salaries, but overseas travel is ridiculously expensive. I've found that it's mostly the people who can afford it who proclaim the benefits of travel.
My point is you can travel on the cheap if you put effort into it, especially in South America. Traveling in Europe? Sure, that's going to be just as expensive if not more than simply living day to day in the states. There are definitely places you can travel without making a six figure salary however.