True, retirees don't get to see the full benefit. However, retirees do benefit from the anti-inflation properties of their investment, unlike if they had their money in cash, money market, or bonds.

Discussing this inspired me to write an article. You can see it here: https://steemit.com/silver/@infinite-monkey/silver-and-gold-for-insurance-not-profit-use-market-manipulation-to-your-advantage