An example: Sarkozy decided to launch a big loan of 50 billions. Of course, those who are going to lend money to the state are those who have money. To sum it up: the riches. But it will be necessary to repay the loan with interests to those people. So the French government prefers to borrow money to the riches instead of taxing them.
In my opinion if the state needs money, it should have it by taxes instead of by loans, which is more expensive for the society.