He cannot discipline Richard Holloway in any way, though one does not think that he would personally invite him to speak at Canterbury Cathedral. The Scottish Episcopal Church, like the Welsh and Irish is entirely self-governing. George Carey has promoted the Primates Committee of Anglicanism, trying to give it more authority, and Richard Holloway sits on that Committee with George Carey. A denomination without discipline is one which has lost one of the three marks that characterise a genuine church. So just two to go, and one of those is witnessing to the gospel of Christ crucified and risen from the dead.
Bad religion drives out good.
For the sake of its own survival, Anglicanism's only answer is to take a leaf out of Rome's book and become more draconian. We were part of a movement which in the 1960's distanced itself from that sort of heresy and immorality in the professing church. We wanted the world to see an expanse of blue water that separated us from those who were in leadership in denominations yet who preached another gospel. These were two different religions. We formed publishing houses, opened Christian bookshops, wrote books, launched magazines, sent our men to train in our own seminaries, and refused to give a penny to denominational funds which kept men who held those views in office for one more day.