Yes, and almost every situation where somebody that has documents is served a subpoena for those documents can demand a fee to provide them, but thy do still have to provide the documents.
I always assumed that even then you had to be paid, like the guys who get pay measured in double-digit-cents-per-hour to make license plates or whatever.
Although I guess forced community service could be thought about the same way.
I don't know much about the inner workings of the penal system, but the 13th amendment (which generally abolished slavery) specifically allows for involuntary servitude as punishment for a crime.
AFAIK, yes. I guess it also depends on what it is, photocopying a single page is different from spending a week coding a solution to what the feds want.
Can you imagine the feds forcing you to do things that take a year to program, even if you don't have the resources?