Counterpoints:

https://en.wikipedia.org/wiki/Tammany_Hall

https://en.wikipedia.org/wiki/Teapot_Dome_scandal

https://en.wikipedia.org/wiki/Sanborn_incident

https://en.wikipedia.org/wiki/Whiskey_Ring

https://en.wikipedia.org/wiki/Black_Friday_(1869)

https://en.wikipedia.org/wiki/Cr%C3%A9dit_Mobilier_scandal

https://en.wikipedia.org/wiki/Oregon_land_fraud_scandal

and that's just the 19th century, nevermind the 20th.