Sullivan: Pirates of Penzance, Come Friends

The melody came from a comic opera about pirates by Gilbert and Sullivan with these lyrics:

Come, friends, who plough the sea.
Truce to navigation,
Take another station.
Let's vary piracy
With a little burglary.

But most people associate this melody with these lyrics:

Hail, hail, the gang's all here.
What the heck do we care,
What the heck do we care?
Hail, hail, the gang's all here.
What the heck do we care now?