I don't know if I'm more depressed because the problem is so pervasive throughout our economy or because I'm experiencing a bit of 'misery loves company''; hey, we're not alone!
Net, net - IF 1) you are only selling your experience, knowledge, and wisdom gained over years of 'been there, done that', all people think you're giving is your time.
2) and If you believe everyone is equal, then everyone's time is of the same value.
3) and If you believe the above and also believe you have little value (because you haven't 'been there and done that')
Then all our time is of little or no value and you shouldn't hesitate to get a little free time.
Personally, I agree with Margeret Thatcher; eveyone is not equal. Everyone should get a equal opportunity to succeed. However, not everyone will succeed equally. Some by chance, but mostly by hard work, natural talent, and superior intellect. For me, it's a good thing luck is involved.
'Hey mister, do you got a dime? Mister, do you want to spend some time?'