There are two aspects to this :
a) Perequation : transfers from richer entities to poorer entities (this is especially true at the municipality level)

b) Jacobinism applied to decentralisation. Rather than giving the entities (departments, regions) the right to raise taxes themselves, the government prefers to keep them on the dole.

So it's certainly not true that there are 101 billion euros of net fiscal transfers; but certainly, there is a considerable amount of effective inter-regional transfer going on. Not sure if Normandy is a net beneficiary.

_{It is rightly acknowledged that people of faith have no monopoly of virtue - Queen Elizabeth II}