The phrase "financial excesses" refers to situations or actions where people spend, borrow, or invest money in an excessive or unnecessary way, often leading to financial imbalance or negative consequences. Full definition
What an extraordinary account of financial excess at a time of austerity. (schoolsweek.co.uk)
But it's even stronger than that: a period of relatively stable prices and relatively low and stable interest rates actually can feed financial excess. (macleans.ca)
The idea was to put the responsibility for curbing financial excess out of reach of elected officials. (theglobeandmail.com)