Editor, why "update" the source to replace "English government" with "such governments"?

The letter is about the British monarchy and Parliament.

Jefferson states, "This is the true character of the English government in practice, however different its theory; and it presents the singular phenomenon of a nation, the individuals of which are as faithful to their private engagements and duties, as honorable, as worthy, as those of any nation on earth, and whose government is yet the most unprincipled at this day known."

Isn't the letter about the power of incumbent government and its beholding to the factions to whom it owes its installation?