In many countries it's a value in itself that people vote.
The GOP will not be happy until it has an effective monopoly on political power. There will be tolerated minor parties that know their places for window-dressing, but 70% of all votes will go you-know-where. People will know how their employers expect them to vote, although there could be safe places where Democrats might win House seats -- like the South Bronx, Harlem, the South Side of Chicago, Watts, maybe a rural district here and there in Mississippi or Alabama all to create the illusion that the United States still has some pluralism. Parties might be divided along ethnic or religious lines so that there is a "black" Party, a "Hispanic" party, and maybe a "Chinese", "Jewish", or "Muslim" party. Maybe on 'professional' lines, as in distinct parties for accountants, engineers, teachers, or physicians.
But if one works for a big corporation one knows how to vote... maybe one's employer makes the decision for you in secret. After all, there will still be a secret ballot -- one so secret that even the voter dares not know how he 'votes'.