bread-and-butter issue vs pocketbook issue

bread-and-butter issue and pocketbook issue both are nouns.

Word	Noun	Adjective	Verb	Adverb
bread-and-butter issue	Yes	No	No	No
pocketbook issue	Yes	No	No	No

As nouns, bread-and-butter issue and pocketbook issue are synonyms defined as:

bread-and-butter issue and pocketbook issue: an issue whose settlement will affect financial resources

bread-and-butter issue (noun)	pocketbook issue (noun)
an issue whose settlement will affect financial resources	an issue whose settlement will affect financial resources