Perhaps these mayors (and The Premier for that matter) should look at reductions to salaries and benefits paid to government employees as a means of financing infrastructure. Take a look around in towns like Innisfil: the highest paid residents are teachers, police, firefighters, hydro workers and other government employees. Take a look at retired residents' levels of pension income; haw many with good pensions come from the private sector. 
The percentage of government revenues spent on salaries and benefits has risen to in excess of 50% and pension costs resulting from longevity and low interest rates will fuel even greater increases. Ask the mayors where the former employees of Sears are to find the extra money to pay the HST increases ?