Backpacking in M'sia and Difficulties?

I do agree that backpacking lifestyle is quite interesting. We walk and tour on our own leisure

Many said that backpacking does not need much money, perhaps its true when you are already at that place, but what about flight tickets? Air Asia doesnt always have cheap tickets especially for countries like those European countries ..

Ive always wondered how many backpackers earned enough for travelling purposes and for their future use? Ive seen many young backpackers ranging from age 20-30 touring around for one year or two and then back to work for a year and then continue travelling. How do people travel at such a young age, spending more than $10,000? Does this mean they have good pay? or does it mean they dont have baggages (families to feed, bills to pay, loans, food, etc) or does it mean they forego their future savings for current-satisfaction?

And lets say, they work for 1 year, and travel for one year, can one climb up the ladder of the working world? Become someone successful in the future? and m not saying those who travel for business purposes. Ive seen backpackers saying they work one year in NZ or Australia picking apples, working at McDs and such. I am not saying anything about these jobs, but how about self-development? And How about old age fund like what people usually get from EPF and SOCSO?

Is it necessary to forego future financial investment if we want to travel often like this? If able to, I would like to get more views on these issue. I hope someone can shed some lights here. I wonder what I have missed or misunderstood?

Thanks In Advance

Cheers