In terms of throwing off a lot of passive income, they just aren't very good though. Looking mainly at income-generating investments, the best index one might be Vanguard LifeStrategy income (with provides income and moderate capital appreciation to protect against inflation).
The yield? 2.1% Nothing to write home about. [1]
Is there some high-yielding, regular-income fund I should know about? Even allowing for sorta-irregular funds, you probably can't do much better in this environment, though I'd like to be proven wrong.
[1] https://personal.vanguard.com/us/funds/snapshot?FundId=0723&...