The eldest son was following in his father’s footsteps only in another department, and was already approaching that stage in the service at which a similar sinecure would be reached. the third son was a failure.
There are no more uses of "sinecure" in the book.
Show samples from other sources
He does have a job in the company library, an undemanding sinecure where he can do a lot of reading without bothering anyone, and occasionally he does a little research for one of the legitimate biologists on the staff.
William Styron -- Sophie’s Choice
After confessing to these things they had been pardoned, reinstated in the Party, and given posts which were in fact sinecures but which sounded important.