This shopkeeper getting dinged has $750k inside their corporation earning 7% (a very respectable return for passive investments) generating $52,500 a year in passive income. Their (corporation's) tax bill increases by approximately $1200 a year. Boo-hoo-hoo.

Let's say that "shopkeeper" with $750k inside his corporation invests more conservatively and only earns 5% a year (still not bad at all). Their (corporation) tax bill doesn't change a nickel.

Anybody think a "shopkeeper" with three quarters of a million inside their corporation (not even counting their personal assets, which, if you have $750k inside a corporation, are bound to be significant) is NOT an upper class shopkeeper?

The problem is, you don't understand what you are talking about.