Personally I do not believe that the role of Gov is to " to encourage good by punishing evil, "
That is not how the Founders defined the role of Gov.
Thomas Jefferson said, “What more is necessary to make us a happy and a prosperous people? Still one thing more, fellow citizens -- a wise and frugal Government, which shall restrain men from injuring one another, shall leave them otherwise free to regulate their own pursuits of industry and improvement, and shall not take from the mouth of labor the bread it has earned”
Stop people from hurting and stealing from one another. If two women marry it does not hurt me at all.