Seems odd to start with corporate income taxes as it seems pretty efficient to not tax corporations and encourage more distribution to individuals and tax there.
I remember in my microeconomics101 course how taxes on corporate profit are easy to squish around with tax deductible benefits that reduce profit (eg, country club dues are an expense, corporate jets are an expense, 5000 square foot offices are an expense). Since it’s hard to police these expenses, it’s more efficient to just push all profits to salary and dividends to individuals and tax there since there are so many fewer individual exemptions.