It is not clear to me whether that will be going to millionaires. Right now, anyone who has a taxable income of less than, I believe, $128,000 per year would be able to receive at least some old age security payment. As for whether or not people with incomes higher than that are also going to be considered, I don't think they are, but that, to me, is not well defined at this point.
On May 22nd, 2020. See this statement in context.