respectfully, those sound like nonsense variables to justify a priori conclusions. (and tons of people on FT will use all sorts of justification for their traveling in 1 class or the other.) many major companies and industries have vastly different policies.

nobody making or approving travel policies does it based on a numerical basis like that. premium classes are first and foremost a matter of comfort (and much less so "productivity"), so whether one class fly in premium mostly has to do with pay and prestige. those who highly paid roles are in P&L with sufficient margins for such expenses, and "deserve" the extra comfort. mostly.