1) bans government unions from bargaining over health insurance,2) requires that all government union members pay at least 10% of their wages toward their pensions, 3) ends seniority rights as the sole factor in layoffs, 4) replaces seniority pay raises with merit pay raises, 5) bans government unions from striking, and 6) makes government union dues voluntary. But government unions would still be able to bargain about many other topics including pay and working conditions.
Romney is no conservative. He is trying to be everything to everyone. That will not work. See McCain 2008.