Helping others is more valuable than just making money because you are changing people's lives. You are doing good for someone and this is the most valuable thing there is in our world. Of course, if you can help others and make money while you do it that is great too!
Don't get me wrong, I am all for helping others, but to say it is better then making money is a bit far fetched. We all need to support our selves, and put food on the table for our family or potential families. Helping others out who are in need is a great thing, but definitely not more valuable then making money at a real job.