Robert,
The salt in the posted recipe would be 2.15% assuming that we accept that the salt in the cheese isn't available to the whole.
FWIW Fidel Toldra, the World renowned meat scientist, says in "Principles of Meat Fermentation" p34:
Because the added salt contents may vary from 2.2% to over 3% in fermented sausages (in fermented whole meat products, from 1.7% to very high concentrations), this is enough to suppress growth of the most bacteria, especially gram negative ones (Petäjä 1977).
This reduces Water activity and contributes to safety, particularly in the early stages. I doubt that anyone can taste the difference between this and 2% after drying, so in the interests of food safety would not be pedantic and would choose to use an amount higher than 2.2%. After all, the commercial product that you've so enjoyed is likely to have a higher amount.
...and as to Robert's forum signature?
...that's best left unsaid.
Phil