There are numerous programs which the Guaranteed Annual Income could replace at less cost. Two are mentioned, namely Child benefit,  Ontario Works or the Ontario Disability. The child benefit goes to people with money. Stop that. And so with the Ontario Works if the family has money. Taxpayer money should go only to the poor. Some poor may cheat the same way that many other people cheat but best to pay a few cheaters that miss some poor. 

Now a lot of people are poor  because they cannot find employment. This is not surprising since there has been a tremendous increase in the number of two income families. In 1950 21% of women were in the work force. In 2015 82% of women in the work force.  

I believe this large increase in the workforce was due to a deliberate advertising campaign consisting of articles upon articles about women in the workforce. Few about women at home. The result  -  counterproductive - more workers, smaller salaries and fewer jobs available . Good for business.