The after-tax salary of the Governor General would certainly be determined by his own personal situation. The calculation of the salary for 2013 was based on the assumption that he has other income upon which he pays taxes. Therefore, his salary adds to his taxable income and is taxed at the top marginal rate for a person living in Ontario. The level of $270,602 is set so his estimated salary in 2013 will be the same on a net basis...so his pre-tax salary of $270,602 will be the same as it would be if it were not taxed.
In terms of his personal situation....