Yoking a human brain to perform tasks that only a human can get right, but not having to pay them, a basically get to use them like software.
About the only thing keeping this from becoming a reality is it probably costs more in labor to maintain the bodies than to just have desperate people perform the same tasks for extremely low pay.
Then again, Palmmer's current company builds automated weapons. Imagine a missile guided by an on-board human. Not remote, on-board. The Japanese did manage to employ Kamikaze's but generally it would be pretty hard to source a supply of willing and trained volunteers for that. But you could stick someone in this, run them through training games more or less perpetually, until one day it's not a game and the victim simply does their usual job unaware they are a human bullet this time.
Still probably impractical because of the life support, but maybe not. You don't need any more life support than an ordinary jet fighter for a short one-way trip, and what was impractical yesterday is no longer impractical tomorrow.
It should be thought about, because it can actually be done roght now, which means someone somewhere will do it, or already has.