Should/Would the Noble Sangha let go of the Dhamma?

Supposed that respect, veneration and any kind of wisdom has gone missing; and that the Sangha has become a group of householder wearing robes; and the leaders of the Sasana are all but householders. In that case, should the Noble Sangha, the Savaka Sangha, let go of their heritage, like one with Sila would give up a book that has become a target of white ants? It's a serious question. While the Buddha did not allow his monks to give up Sangha heritage, generally he allowed it in case thieves and robbers would destroy things and harm in cases the monks would hold on it. Is that, the degeneration, actually the reason why such as householder movements became that popular? Spoken in numbers, there are about 99% of laypeople (incl. those in robes) who are engaged in depriving the Dhamma from the Sangha, making a livelihood from it; and somewhat 1% who dedicate their sacrifices toward the gems, and respect the recluses. I doubt that any at large had understood the meaning of "making the Dhamma your own", yet, with total confusion, running after it out of context. Should the Noble Sangha let them follow their inclinations which brings not only them long time suffering but for many? Resting simply in "Beings are heirs of their kamma..." or still share as much as compassion as possible to keep those able away from doing really grave wrong doings?