Pyrocrat
Concept · Stellaris 4.5.2
Pyrocrat in the Stellaris encyclopedia: Pyrocrats replace Politicians on planets with Habitability lower than 50%. They turn Consumer Goods into Unity and Amenities.
Pyrocrat in the game's words
The encyclopedia entry as the game shows it in its tooltips; underlined words open their own entry or page here.
Pyrocrats replace 
Politicians on planets with Habitability lower than 50%. They turn Consumer Goods into 
Unity and Amenities.
An entrenched elite whose brilliance defines the state, Pyrocrats rule as living flames and are sustained by the labor of those who stoke their glory.
Source: common/game_concepts (concept_inf_pyrocrat, also concept_inf_pyrocrats) and localisation/english, Stellaris Cygnus v4.5.2 (9776).