Tell you what:

If you think you can reject the moral teaching of the Church at will, then I can reject the social justice teaching of the Church as well.

If your Conscience does not have to be aligned with the Magesterium on matters of moral doctrine, then my Conscience does not have to be aligned with the Magesterium on social justice.  

On basis do you tell Catholics they have to obey the bishops when it comes to Catholic social teaching when you disobey those very same bishops on Catholic moral teaching?