To the Liberal advisers monitoring the feedback on this "trial balloon" idea to raise capital gains tax:

Don't do it. The boomers will not only not like it, they will talk about it endlessly until the next election. 

Remember, the civil servants and politicians will all retire on fully-indexed, defined benefit pension plans. Impact on them from a capital gains tax increase: negligible. The majority of other working Canadians don't have defined benefit plans and depend on their savings in retirement. Impact on them, particularly as they get close to and enter retirement: significant.