imo, for that to happen it would require a voters revolt, i.e., voters vote against congresspersons/senators that would not force such a reform(whew that gets things to happen:).
I do not think members of the congress and the senate, in the majority do not vote their conscience.
If the majority of members and congress were like McCain and Sarbanes i could see real reforms happening; but they constantly get their bills stripped down when push comes to shove, that is the lobbyists versus honest members of the house and senate, and the lobbyists win by pushing off critical
reforms.
I feel if the majority of voters understood these matters there would be a voters revolt to force such a reform, but there is the rub, what percentage of voters actually even know short positions are delayed 2-weeks??
i think to get this needed voters revolt one would need a highly funded media blitz to educate them and get them 'mad'.
Now who would fund such a move to raise voters awareness???
Bottomline, brokerages respond , i feel, only, to the point of a gun.
If legislators see their holding office requires they point a gun at the brokerages, then meaty, major reforms to level the playing field could happen,imho. max