"Trickle down stimulus" is not an economic theory. It's a criticism of supply side economics, equivalent to calling Keynesian economics "money printer go brrr" stimulus.

Arguably, corporate bailouts like we're seeing now ARE a Keynesian stimulus because they're meant to keep businesses afloat while consumer demand has fallen off a cliff so that they can continue to do business (i.e. maintain demand for business inputs). Few if any of these corporations are taking the bailout money and investing it in capital infrastructure.

The bigger issue is that the "current path" is to use both Keynesian stimulus and supply-side stimulus with no regard for the deficit. At some point, unless the US has another WWII-like economic expansion, all the debt we've created to fuel these policies will need to be paid back, either explicitly or implicitly through inflation.