Not only do many important government systems ultimately rely on or make heavy use of COBOL...
So do many older private companies.
Like banks. Account balances, transactions.
Its actually quite a serious problem that basically nobody who needs to take seriously actually does.
Basically no one is taught COBOL anymore, but a huge amount of code that undergirds much of what we consider 'modernity' is written in COBOL, and all the older folks that actually know COBOL are retiring.
We're gonna hit a point where the COBOL parts of a system to be altered or maintained, and ... there just isn't anyone who actually knows how to do it.