When language becomes a policy matter, the crux is the policy intent.
For the purpose of enhancing the livelihood of the people, the intent must be commercial and economic.
In the matter of culture, if culture is seen as a way to increase the likelihood of the survival of a people (which also means an improvement to their welfare) under all circumstance, then culture should have a stronger economic element than mere sentimentality over an established sense of identity.
Preserving a culture strictly in its old mode may be a futile attempt at stopping the flow of time and the changes in the environment. It resists adaptability and resourcefulness. It builds up narrowness for ease of control which in turn may quicken its own demise.
A good language policy is one that liberates the young from the grips of the old so that the young can chart a new future for themselves in the new world that will confront them, where they like it or not, as a direct consequence of the mindless actions of the old generations. The young will suffer the consequences of our errors and we must give them the means to save themselves from us. We must educate them by exposing to the frontier knowledge of the world, rather than hidding them under the coconut shell.
A good language policy should enourage the flourishing of knowledge in order for wisdom to grow.