If I plan like that existed, it would be good for building a customer base. However, keeping in mind, the bandwidth strain. Pushing hefty amounts of data over a multi million dollar customer base could cause tower strain and slow service.
We must also factor that Koodo is a Sub Brand of TELUS. If Koodo were to offer this plan, imagine all the switches from TELUS. They'd loose there 7+ million customers to a smaller brand that is devoted to reduced rate plans and reduced smartphones.
If in the future, (even though not likely), I'd assume that one of the big three,
ROGERS, BELL or TELUS would offer and not there sub brands,
(Virgin, Fido, Koodo)