That YouTube image screams: I drink your milkshake. I DRINK IT UP!
Seriously, taxing the income of the rich with a nose-bleeding rate of 70% is a horrible idea. For one, that's immoral. Second, the rich will restructure their finances to reduce their income and boost, for example, their capital gains. Of course, the next step for Cortez and her ilk would be to go after the wealth of the rich people. That's another horrible idea because capital in the modern world is highly mobile. For instance, European countries would be more than happy to transfer in hundreds of billions of dollars from Americans who want to protect their wealth.
The simple trick has always been to make America a more attractive place for money and talent. Shockingly, that happens with lower tax rates.