Paragraph 20 out of the article in the Sept 2014 study WT about fulltime service says this...
"Full-time servants age, and so do their parents. When parents are Witnesses, likely their fondest wish is for their children to stay in their assignments. ( 3 John 4 ) Of course, if their parents need care, full-time servants will do all they can and will come to help them as often as possible. Still, those back home may help those in the full-time ministry by being ready to provide care if aging parents need assistance. Bear in mind that full-time servants have significant responsibilities in the most important work the world has ever known. ( Matt. 28:19, 20 ) Could you or your congregation lend a hand if the parents of full-time servants need help?"
Pretty much my understanding of this doctrine is now this......Do NOT save or plan for retirement because the end is SO CLOSE, and don't have your kids save or plan for retirement. Spend all your time placing watchtower magazines. When you get old and need care and are unable to afford proper care due to not planning for retirement, your kids can help ONLY with their 'extra spare time' BUT their first priority is continuing to place magazines full time. The scripture about caring for aging parents and providing for those of your own household doesn't apply because the faithful and discreet slave say placing magazines is more important!