It could, but it won't or will only do so marginally. The "inclusion rate should go to 100%, but you probably have to be mindful of what foreign countries are doing, which is the only remotely valid reason to give this form of income better treatment than other forms. Dividend inclusion should also be increased. At least that can be justified by the fact the income has already been taxed, but it has not been adjusted to reflect much lower corporate tax rates.