What did Scrooge say about giving his clerk a day off?

From the text:

"You'll want all day to-morrow, I suppose?" said Scrooge.

"If quite convenient, sir."

"It's not convenient," said Scrooge, "and it's not fair. If I was to stop half-a-crown for it, you'd think yourself ill-used, I'll be bound?"

The clerk smiled faintly.

"And yet," said Scrooge, "you don't think me ill-used, when I pay a day's wages for no work."

The clerk observed that it was only once a year.

"A poor excuse for picking a man's pocket every twenty-fifth of December!" said Scrooge, buttoning his great-coat to the chin. "But I suppose you must have the whole day. Be here all the earlier next morning."