The long arm of something
Definition 1 of 1
Pro Tip 1/3Idiomatic Usage
This phrase is commonly used as an idiom, suggesting someone or something has a surprisingly far-reaching influence. 
Even abroad, I couldn't escape the long arm of my company's policies.
Pro Tip 2/3Authority's Reach
It's often used to describe how the influence of authorities can extend far beyond expectations. 
She thought she was safe overseas, yet the long arm of the law reached her.
Pro Tip 3/3Negative Connotation
Sometimes implies a negative feeling of being unable to avoid oversight or consequences. 
He tried to hide his income, but the long arm of the tax authority found him.