The person who initially invested does. I don't see at all how this is a tax dodge.
$10 of taxes deferred for 30 years at a modest interest rate of 2% puts an extra $8 in the investor’s pocket that should have gone to the government.
Edit: Though now that you mention it, I think I must've known this at some point in the past: that ETFs had preferential tax treatment. A while back, I moved my most recent investments to ETFs, even for the "same" fund (example: Vanguard Tech VITAX mutual fund vs VGT ETF) ...
Still, how are ETFs treated differently from a stock?