What’s the big deal for using our work phones?

The phone bill was exceptionally high. Man called a family meeting to discuss.
Dad: This is unacceptable. I don’t use home phone, I use my work phone.

Mum: Me too. I hardly use home phone. I use my companies phone

Son: I use my office mobile, I never use the home phone.

All of them shocked and together looked at the maid who’s patiently listening to them.

Maid: “What? So we all use our work phones. What’s the Big deal??