From the Ottawa Citizen...
According to employment rules for the House of Commons, an employee who resigns after at least 10 years continuous work in an MP's office is entitled to severance worth half of one week's pay for each year of service, to a maximum of 13 weeks.
That includes employees in opposition leaders' offices. Political staffers in ministerial offices, including the Prime Minister's Office, get even more generous severance and don't have to work a minimum number of years in order to be eligible. They get two weeks' pay for each year of service, with no ceiling on the maximum payout.
Treasury Board guidelines for ministerial staff stipulate that severance pay "will be the same for resignation, death, dismissal, lay-off and retirement." On top of that, ministerial staffers are eligible for separation pay, which is paid at the discretion of the minister.