It is an interesting case not only for finance management, but also for retirement funds.
The problem is that is does not allow for any flexibility, that is, you may actually need your money for an emergency. Also, you could potentially ask for a loan against the fixed income you have, making the process useless.
An entire purpose is to not allow to much flexibility, but really you don't have to put like 100% of what you have. Additionally if someone was able to survive without big money till this point why all the sudden he need it all so desperately.
Really? Have you heard about Cancer? Have you heard about accidents? Of course there are moments in which you need all.