Why should I be bound by your values but you can't be bound by my values? You are free to use your moral compass (and should) when voting, when debating, when campaigning, when serving, etc. But once a final vote has happened, the law is supreme and even those who voted it into practice cannot change their mind and decide to violate it, until the next vote happens.
Just imagine what it would be like to establish the "morality police". The first problem that arises is what should be considered moral and therefore needs to be enforced, and what should not be considered moral and therefore not enforced. And how do you decide that? Through voting, debate, a free press, separation of powers, etc.