Here is the distribution of the tax in France for 2018, according to the general direction of the French tax.
Now the question is on which sectors to decrease the expenses in the future, and on which to increase them. We already know that we must not touch education (education = civility, respect), and security. We can probably reduce the development of territories that has received a lot of finance in recent years, the solidarity that some are abusing (adjacent increase in rents, …). It is probably necessary to increase the ecological transition (to push the cities to plant trees, to inculcate schoolchildren by also planting plants, we could even incite every human to plant at least 10 tree per year), the support to the economy, and civic life (put more camera and give fines for garbage, insults, aggression, …).