The OECD study you cited states:

"The proportion of female entrepreneurs in Canada has remained steady at around 25% over the past
decade – a higher proportion than in the US or across the European Union. Compared to men, women
entrepreneurs tend to have less experience as business owners and spend less time on their business, often because of family commitments: this contributes to the 36% gender earnings gap for the self-employed, which is around the OECD average."

Note the precise quantification of the gender earnings gap at 36%, and the fuzzy quantification terms like "higher" "less" "less" (again) and "often" used when assessing causal factors for the observed gender earnings gap.    

As popular a notion that equal pay for less work must be for the deep thinkers  at the CBC, Globe, Star and OECD, the idea needs some meaningful data to avoid characterization as a socialist cash grab..