Why was the financial crisis such an important cause to th French revolution?

A lot of people say that one of the main causes of the French Revolution was the financial crisis. (e.g. debts of the crown due to going to all the wars etc. )


But how did these debts affect the people?


Ive looked on the Internet but cant seem to find the stuff that I need


Thanks for any help.|||raising taxes, price of grains, etc