From my experience only: the idea to outsource to under experienced developers is done by upper management who want credit for saving the company tons of money.

From my experience only: the idea to outsource to under experienced developers is done by upper management who want credit for saving the company tons of money. Then they leave the company in a year or two after claiming great money saving victory and moving on to their next scam C-level job. If you build in milestones, then it's a chance to prove that the executive made a bad decision and wasted money on a useless transition. I've witnessed this in 3 different companies.