There is always a source. I believe "it" comes from driven individuals whose efforts and ingenuity, along with their willingness to take on risk, creates a good or service that others want for themselves and are willing to trade for it.
They are the source of what trickles down. They are the ones who create products and they hire people to fill the jobs that produce those products.
The better the productive "they" do, the better we all do, as it all trickles down from their initial drive and creativity.
The more you hamper them, the more that interference trickles down via lost jobs, lower wages, fewer goods and services available, etc.
It all flows from the source, whether you poison the well or keep it pure.
And yet right now they are enjoying their largest share of the nation's wealth in a century but they aren't trickling anything down. Right now their corporations are experiencing record levels of proft but they aren't trickling anything down. Instead they are hoarding.
To keep the economy growing and moving cash needs to be in hands of people that will spend it. Increased concentration of wealth and cash hinder economic growth and expansion. The danger of the fiscal cliff isn't that taxes will be raised back to Clinton levels, it's that government spending will slow too quickly in an era where private spending isn't picking up the slack.
It all flows from the source, whether you poison the well or keep it pure.
Without customers the best idea in the world will fail.
#15 expresses well the reason I criticize people for adopting this nonsense imagery.