Actually, the Angus Reid survey asked a number of questions about support for the system and then asked people what their support would be with different instruments, not just the GST.
Canadians want a universal public program.
I will be clear: I helped Angus Reid design that survey and was responsible for some of the analysis. They asked a number of questions about fundraising instruments or tax increases that would have been between $5 billion and $10 billion in additional revenues raised to support a program, which is much more than you need to run the program. GST increases were the least popular, if I remember the responses.
Canadians generally preferred the idea of having corporate taxes returned to the rates that they were in 2012 as a mechanism for raising sufficient revenue to run a pharmacare program. I suppose in the minds of the Canadians who responded to that survey, the employers are going to benefit from reduced costs of employment-related health insurance, so maybe they could make that cost up by contributing more through corporate taxes.