"Because I'm a man and I prefer to do my own hunting." What begins as a fresh pre-Code fun (although an undeniably sexist one, when you think about a role reversal: inviting your employees for dinner to discuss "business" and then getting rid of them when you've had your fun), falls flat by exposing Alison's persona of a hard-working and determined career woman as a facade that needs to be torn down by the right man.
He can only respect her in the context of business, a context in which there's no room for emotions or human relationships. She, unable to reduce herself to a calculating machine, instead makes herself nothing in his eyes, in order that he may love her. The much derided ending actually completes the film (unintentionally, to be sure) in its portrayal of the dialectical mutual dependency of capitalism and patriarchy.