I think it is interesting that a Senator thinks people would be better off under a plan that isn't subject to the rules and participant protections that he and his cohorts have required the rest of us to comply with. As much as I dislike some of those rules, I understand that they were implemented to prevent real and perceived abuses by plan sponsors. Those rules also increase the cost of operating a DC plan.
I also wonder what protections participants have under the federal thrift plan. One of my aunts worked for a large local city in the late 80's and contributed to their DC plan. When she left, they sent her a letter saying that if she did not take a complete distribution within 2 years, her entire balance, including her deferrals, would be forfeited. At the time, I asked an ERISA attorney I knew about it and he said a governmental plan could do that.