Does college degree really develop more income?

Yeah I think so. Even OJTs have interviews and most companies want OJTs that are pursuing bachelor's degree. If its hard to find an OJT, how much more it is to find work. And don't expect to get promoted much if you only possess vocational diploma. Just study as long as someone is giving an effort to let you study :)

Not a guarantee, especially here in the Philippines where there's a surplus of professionals... college graduates, 2-yr course graduates, and short term course graduates. BUt if I may add.. it's the good attitude, appropriate behavior, and outlook in life that's learned most importantly... and not just academically learning. More often than not, we forget the things we've learned and memorized in class don't we? So, I would still encourage going to college even though it does not assure anyone of a stable or good income.

I have heard that you can make the same amount of money even if you don't have a degree. You can also, have an college degree and still be without a job.