The original quote is something like "Give a man a fish and he will eat for a day. Teach a man to fish and he will eat for a lifetime." Joe Wong's joke is based on literally giving someone a fish. The person will wonder why on earth you did so.

It's a play on a english saying, "if you give a man a fish, he eats for a day. if you teach a man to fish he will eat for a lifetime." he's just stating that the parable if thought about in a modern context is pretty out of place

授人以鱼不如授人以渔 --出处《道德经》 This original quote from 《 dào dé jīng 》

I think the original quote might be from the bible. I'm not sure though.