At this point, with my career in the rear-view mirror, I am of the opinion that the retirement plan rules are fundamentally broken and unfixable. We have widespread noncompliance, both due to complexity and willful neglect. I can't say I've given it that much thought but maybe, just maybe, we need to move to some kind of mandatory employer contribution (SS after all is a mandatory employer contribution) that goes into some kind of DC plan...like a SH nonelective. Get rid of the auto-enrollment stuff, or at least make it optional. And increase the 401(k) max but decrease the overall DC 415 limits and get rid of cross-testing (if you want a DB plan then put in a DB plan!) and otherwise simplify. I am literally doing this on the fly so it's not like I gave it any previous thought, and my opinion is no doubt colored by working with small plans and largely taking TH contributions as a given.