This has to potential to make the free market more efficient by encouraging small business. Entrepreneurs are free to experiment if they are not worried about having a roof over their head or where there next meal if going to come from.
As a socialist, I can assure you that I do not believe Mincome should be in addition to all social programs. Health care and Education are a public good that should be kept public (As I understand it, Obamacare is not public health-care, only mandatory insurance).
Things Mincome would replace: Employment Insurance, provincial Welfare, and many other specialized social assistance programs. I think the Canadian Pension Plan should stay, since in theory, it is self-funding. These systems have large bureaucracies and complicated rules to prevent people from "abusing" the system. Because of the complexity, people fall through the cracks. People on welfare get taxed at at 100% rate (called a "clawback") if they actually find enough work (or even federal grants) to double their pittance. Even the top tax bracket in Canada is only 29%. Edit: the top tax bracket is 39% or more if provincial tax is included.