Why did debra oswald write the play called dags?

There is no known play called "DAGS" by Debra Oswald. It's possible you're thinking of a different playwright or a play with a similar title.

Debra Oswald is a well-known Australian screenwriter and playwright. She has written several plays, including:

* "The Heartbreak Kid": A comedy about a woman who falls in love with a con man.

* "The Book Club": A drama about a group of women who are forced to confront their own lives.

* "The War at Home": A play about a family dealing with the aftermath of a war.

* "The Secret River": A play based on the novel of the same name by Kate Grenville.

If you can provide more information about the play you're looking for, I might be able to help you find it.