Sorry but morales aside. Why not harvest organs like this that can't be harvested from volunteers (without them dying). Go China.
There are Falun Gong members who hand out leaflets about this issue in Chinatown in San Francisco just about every day.
According to them, the Chinese doesn't just harvest organs from dead prisoners. They also harvest them from live prisoners, supposedly. As in, they are alive when the surgery takes place. After that, they are dead prisoners. Execution by organ harvesting.
I don't know how true all of that is, but then again, nobody does. There have been a few investigations by outside officials, some of whom have made some very damning statements. But other people refute those statements, and mostly China keeps information about executions and alleged organ harvesting very secret.
The brochure I have on my desk quotes Congresswoman Ileana Ros-Lehtinen, a Republican from Florida, as saying: "Falun Gong adherents have been systematically arrested, tortured, sent to forced labor camps for 're-education,' placed in mental institutions for brainwashing, and subjected to organ harvesting."
Again, I have done no actual investigation into any of this myself, I mention it only to suggest that it ain't so cut and dried as "they take the organs out of dead prisoners."