Translate the following English sentence to French:
"With regard to the action plan which seeks to deepen the internal financial services market, I would like to issue a warning about certain strategists who are attempting to hold the liberalisation of the financial services sector hostage, because the work that has been undertaken on the taxation of savings has not made the progress they would have wanted."
En ce qui concerne le plan d'action visant à approfondir le marché intérieur des services financiers, je voudrais mettre en garde devant certains stratèges qui veulent prendre en otage la libéralisation du secteur des services financiers, parce que les efforts entamés relativement à la fiscalité de l'épargne n'ont pas assez progressé à leur goût.