However, until we come up with truly a "complete"/multi-dimensional approach or mindset to replace the GDP/DJI-oriented mindset, and until people are ready to make such a drastic switch to such a different mindset, would it not be helpful to find some transitional position where we allow people to continue working with an easily graspable, easily comparable single number, like PPP median income or, better, HDI, to start to introduce such "revolutionary" notions as including fairness, socioeconomic equality, freedom from ignorance, freedom from government oppression, and so on, beyond mere GDP?

Truth unfolds in time through a communal process.