Translate the following English sentence to French:
"What is more serious than this is the fact that the Commission' s reports on VAT collection have been scandalously disregarded by the other institutions and have not been followed up to any degree by the Member States."
Et plus grave encore, les rapports de la Commission sur les recettes de la TVA ont été scandaleusement ignorés par les autres institutions et n' ont eu aucune suite dans les différents États membres.