Is "wages" a countable noun?
Yes, the noun 'wages' is a countable noun.
A countable noun is a word that has a singular and a plural form.
The singular noun is 'wage'.
The plural noun is 'wages'.
Mark earns a good wage at his new job. (singular)
The wages at his company are above average. (plural)
Note: The word 'wage' is also a verb: wage, wages, waging, waged.