Your statement about paying their "fair share" is demonstrably false. The top 1% earned 20.58% of the income for 2016, and paid 39.48% of the taxes.
In other words, paid nearly twice as much as their share of income.
Massive deficits are a problem. I don't doubt that. The simply fact of the matter is that the deficit and debt are a
spending issue, not a taxation/revenue issue.
The spending on Medicare, social security are driving the debt. Anybody who doubts that is simply not paying attention. Your proposed solution of "tax the rich" simply does not work. Obama taxed the rich and the debt exploded. Why? Because the rich will move income to non or lower tax activities, like retirement accounts, or real estate investment, and not simply turn over more of their income.
Have you not noticed that the top tax Federal income tax rates over the past 55 years have gone down, then up, then down, then up, then down, etc. ... and the share of Federal income tax paid by the top 1% has consistently
increased?
Tax Rates on Various Earnings 1913-2015
Undeniable Trend - Top 1% Pay More Federal Income Tax, Bottom 90% Pay Less
Further, your take that the United States simply does not "tax enough" compared to other developed nations is just not true:
In summation, the problem with the burgeoning debt is spending, not taxation; the problem with income tax revenues is certainly, definitively not a lack of taxation on the top 1%. Only uninformed imbeciles like Ocasio-Cortez believe otherwise.