Should billionaires be allowed to exist?

I'm 61 and I check my 401(k) the way other people check the weather. Here's what the 'abolish billionaires' crowd never mentions. My retirement, my neighbor's pension, the endowment funding my granddaughter's scholarship, all of it rides on the same equity markets that produce billionaires. You can't have compounding stock returns for pension funds without the market caps that create hundred billion dollar fortunes. Confiscate the top of the market and you confiscate the engine underneath millions of ordinary retirements. I'm not defending yachts. I'm defending my ability to stop working at 67.