Translate the following English sentence to French:
"Paradoxically, its income, which comes from oil, is increasing, but none of it reaches the inhabitants, being entirely purloined by the ruling classes."
Paradoxalement, ses revenus, tirés du pétrole ne cessent d'augmenter, mais ils ne parviennent pas du tout aux habitants, ils restent uniquement dans les mains de la classe dirigeante.