Why are American federal agencies so powerful/known globally?

When someone talks about FBI, CIA, IRS, etc. your average German and Mexican fellow will immediatly know what is going on, but when someone hears another country's special force/tax agency, you will have no idea what it is about.

Whenever I see news of a major large scale crime happening outside America, I think of FBI being involved in it somehow. Even if it's a local crime. Same goes for IRS. They operate in US, but when that billionaire British man gets caught for tax evasion I somehow think IRS is going to get their ass.