Most of the video applies to a Millennial and younger audience. These generations got screwed on the necessary components for compounding to work. Forced to pay for exponentially more expensive education than generations prior put them deep into debt right out of the gate. Further, they entered the workforce during the Great Recession which forever put them 10 to 15 years behind in earning power. Lastly, saddled with the two other things, it prevented many from buying homes which appreciate in value.

In short, the younger generations got totally screwed. The compound interest promise still works for X-ers and above.

I agree with the very ending premise: We need to massively tax the ultrawealthy.