A 401k with a vesting schedule geared at minimizing the already empheral retirement contribution businesses don't want to provide hoping on turnover with vesting to reduce payout and for those remaining with enough disposable income to contribute hefty amounts to their 401k? Sure.

Even 401ks are evaporating in significance so that is becoming a less valid point. Given the typical audience here, you and me sure, but the vast majority aren't reaping rewards or able to tie money up in unrealized gains they cant magically realize like many with piles of investments (often tax free).