So, 2 tsp of salt is almost 5g.

I wouldn't assume anyone is getting that much salt unless they're logging their food. Even cheese doesn't have that much. Cream cheese has 83mg per oz.

Feta has a respectable amount: 312mg per ounce.
Cheddar: 172mg

So, it'd take 69 oz of cheddar cheese to make up 5g of salt.

Don't assume you're getting enough salt.

I'm going to get some packets of miso soup and use them at work. At home I'll supplement with salty broth.