To me, the biggest lesson was that we desperately need to increase the Internal Revenue Service's budget.
Cohen, formerly President Trump's personal lawyer, repeatedly offered accounts of not only how comfortable Trump became with cheating Uncle Sam but also how ill-equipped our tax cops were to catch him.
We heard, for instance, Cohen's story about how the president used the Trump Foundation, supposedly a charitable organization, as his personal piggy bank.
According to Cohen, Trump directed him to hire a straw bidder to purchase a nine-foot painting of Trump at auction. The bidder was then reimbursed with tax-advantaged funds from the Trump Foundation.