• Buy Cuba and make it a county of Florida. Having a failed communist state 90 miles from Florida should no longer stand. During the 1962 missile crisis, President Kennedy said he would “give assurances against an invasion of Cuba,” so we can’t send in the Marines. Mr. Trump got skunked on buying Greenland, so let’s get Cuba instead. Give $10,000 cash to each of its 11 million citizens: $110 billion well spent. Then give each Cuban a voucher or chit for a share of each of the country’s state-owned businesses, which is all of them except for a few restaurants and old ’57 Chevys. Like in Eastern Europe, these chits start to trade well before various companies or hotels are ready to be sold or go public. Cigars for all. And we don’t need a 51st star on Old Glory—just fold Cuba into Florida (no income tax!). And speaking of Florida . . .

• Time to fix Social Security. It’s the third rail of politics, but go for it. Set the retirement age to 70 for those born after 1980, 71 after 1990, 72 after 2000. And fix the cost of living adjustment, or COLA, which is 1.6% for 2020. The consumer-price index Social Security uses badly overstates inflation in the digital age. Set COLA at half of the consumer price index. Then, for the young folks:

• Change the drinking age back to 18. The political logic is obvious: They vote. Plus with Uber they rarely drive, and lowering the drinking age would reduce blackout-inducing binge and “pregame” drinking. Most college presidents, in a secret ballot, would probably agree. And these days many teens prefer the “Dazed and Confused” model anyway.