Jesus promised his followers that, if they would put kingdom interests first, they would have food and clothing for the day provided by God. Jesus also said that the Son of God had no place to lie his head. Therefore, there is not guarentee of shelter for Christians. (Matt. 6:25-34)
With this being said, elderly Witnesses who have put kingdom interests first in their life (as defined by the WTB&TS) and do not have the means to provide for their food and clothing for the day are proof of 1 of 2 things:
1) Jehovah's Witnesses are not really putting kingdom interests first as defined by Jesus or
2) There is no God.
For the WTB&TS to take steps to provide for elderly ones in the congregation they would be giving concrete evidence of either #1 or #2.