This may call for some kind of return guarantee to DC plan members during the accumulation phase. Available examples include both absolute return guarantees (as in Japan or in some US states), in which the guaranteed return is set against a pre-specified return, and relative guarantees (as in Chile and Denmark), where the return is tied to some industry average or market benchmark.
These moves show the intent and the policy direction though the ultimate impact would depend on the political process of law making that follows. There are several unknowns, such as, the timing of debates and votes, the floor management on the day of the vote and most importantly, the process by which political differences are narrowed enough to see the results.