They don't. The politicians who voted for this only represent the interests of the lobbyists and financial backers who 'donated/bribed' them during their campaign. Politicians don't care about the will of the people at all, several studies have shown this.
Before America can accomplish much of anything--we need real and substantial campaign finance reform. Too many corporations are able to influence elections and it's not good for democracy. I would think after this last election, democrats could run on this as a national security issue, if they were smart but no one has ever accused them of that.