From blue collar to white collar, Post a sitcom Mom character that worked.
I think of Family Ties - Elyse Keaton, off the top. Can you think of some?

Roseanne -

Wellman's plastics factory
Telemarketing( selling magazine subscriptions )
Fast food worker at a chicken takeout restaurant
Receptionist / hair washer at a beauty parlor
Diner waitress
Helping out at her Hubby's motorcycle shop
Business co owner at the Loose meat sandwich shop.

A few of my favorites:

Kate Bradley (Petticoat Junction)
Roseanne
Grace Kelly (Grace Under Fire)
Harriette Winslow (Family Matters)
Carol Lambert (Step by Step)

Alice- A widowed lady raising a son alone and a hard working diner waitress too!

Angela Bower - Who's the Boss?

Clair Huxtable (Cosby Show) Lawyer
Dee Baxter (Wayans Bros.) Security Guard
Rebecca Donaldson (Full House) Co-Host of Wake Up San Francisco
Jackie Harris (Roseanne) Truck Driver/Police Officer

Edina (Absolutely Fabulous) runs a PR company

Ms. Ann Romano - One day at a time , a very liberated divorced working Mom running an Advertising agency.

Marsha Owens (Mr. Belvedere) - Lawyer
Betty Johnson (Punky Brewster) - Nurse
Kate Stratton (Silver Spoons) - Toy company executive
Katherine Papadopoulous (Webster) - Psychiatrist
Maggie Drummond (Diff'rent Strokes) - Fitness instuctor
Carla Tortelli (Cheers) - Barmaid
Lilith Sternin-Crane (Cheers) - Psychiatrist
Sigourney Gaines (I am Frankie) - Roboticist
Doris Jenkins (Ghostwriter) - Nurse
Estella Fernandez (Ghostwriter) - Grocery store co-owner
Ellen Talbot (Wishbone) - Librarian