RRSPs are dead money if you continue to work and have good income from work and other sources after retirement.
I have a pile of money tied-up in my RIFF for myself and now my wife...and I do not dare cashing it in,  because the government will take almost 50% of it. Only cash in the minimum allowance .
Further our OAS is clawed back to zero and CPP is taxed almost at 50%.
Our taxation system is counter productive. Does not motivate people to work hard and be productive.
Who said that business people and people of  higher income are not paying taxes...unless they are crooks!.
Taxes and death are unavoidable ! Sad in both cases! LOL!