What are you on about? As I said you are taxed on withdrawal in retirement. The obvious benefit is 1) growth of your investments while you contribute (stocks, mutual funds, bonds, high interest savings accounts) are tax-sheltered; 2) the tax you pay in retirement is most likely lower than in your working days (lower tax bracket). Don't know why you keep saying 'tax-free loan' I explained how this is essentially the opposite of this.
Wasn't that other people's money? I thought you wouldn't approve of the victim mentality of welfare recipients, tbh