Has anyone looked at a strategy of deferring rrsp income - leave it all in situ until 71 yoa.

Use heloc or non-arms length mortgage based on rrsp to extract value of savings (including rrsp) into a high yield pf.

collect say, 80-100k (1.5mm pf at 5.5-6% yield) of dividends until 71. Perhaps write off interest paid on heloc or AL RRSP mortgage through capital gains or rrsp withdrawls.

at 71 start withdrawing from rrsp - perahps sell off the dividend PF to avoid having "too much" income.

I estimate the tax savings at 75% by using dividends, so maybe 20k of less tax per year. 

If you do this for 15 years (defer 20k of taxes) might you be further ahead than pulling out 80-100k from RRSP (~33% tax rate?)?

Was thinking at 71, you're going to pay 40-50% tax rate, could "yolo" into growth investments since gains are subsidized (lost to tax anyways).

I don't see such a strategy employed anywhere - why not?