His fiscal argument, that we could afford it if we reshuffled our priorities to buy fewer iPods and more plane tickets, is wrong because buying iPods doesn't require us to quit our job.
If you live like a college student for just a few years after leaving college (keep the shit car, live in a cheap studio, don't buy stuff you can't afford) you'll soon find you've got $50,000 sitting in the bank. I mean look at it, they're giving you $5,000 every week now to work at this job, when they used to be charging you money to go to school. If you can't find the willpower to save a few pennies at that point, there's something seriously amiss.
Anyway, you'll find that your tolerance for a crap job goes way down when you have $50k sitting around and no car payments or mortgage. Spending $10k of it hitching across Africa for a year starts to seem like a good idea.
So yes, by reshuffling our fiscal priorities, we can definitely make travel more doable. I know this because I've done it.