Her vision of ‘accountable capitalism’ would destroy savings built over a lifetime—and sink the economy. //

Who owns the vast wealth of America? Old folks. According to the Federal Reserve, households headed by people over the age of 55 own 73% of the value of domestically owned stocks, and the same share of America’s total wealth. Households of ages 65 to 74 have an average of $1,066,000 in net worth, while those between ages 35 and 44 have less than a third as much on average, at $288,700.

A socialist might see injustice in that inequality. But seniors know this wealth gap is the difference between the start and the finish of...