The collective noun for tax inspectors

A retired tax inspector once told me that the correct collective noun was a 'bunch of bastards'! 

I've since been collating other suggestions: 

A grab of tax inspectors 

A menace... 

A conniving... 

A tithe... 

A levy (levee)... 

A Grabble... 

An Inquisition.... 

A Bogy.... 

A Spectre.... 

A Digger..... 

A ruination .... 

An infliction .... 

A calamity .... 

A chill .... 

A pack... 

A frisson ..... 

A vexation .... 

A ravishment .... 

An infestation....