RE: parliament voteMaybe, maybe not.
The correct political move if you are planning to be against a popular or rather populist issue, would be to do exactly what so far the gov has done. Don't be on record voting against it as a party, let the party pushing it push it so they can't use it as a club come election, then kill it either by the President vetoing it (better to lose a president than the entire party, or by killing it in some behind the scenes smokey backroom type of way.
Its done all the time that way.