Ibister's argument has as its presupposition a basis of moral conduct that opposes capitalism as it has played out in the twentieth and twenty-first centuries though he endeavors to make his moral ideology compatible with this capitalism. It seems Ibister either doesn't see that an entire ideological paradigm shift is needed in order to implement such a ratioed (8:1) redistribution of wealth or he tacitly avoids making the paradigm shift part of his manifesto of wealth distribution.
Further Reading