The premise was that Mike Brady (Dad - architect) was asked by his firm to check on a building in Hawaii. The firm also invites Mike to take his whole damn family along with him on this all-expenses-paid junket - and oh, feel free to take your housekeeper too!
Quite a generous firm!
As a result of growing up with the Brady Bunch, I always felt my family was poor because we didn't have a live-in housekeeper like Alice.
Poor Alice. I don't think she ever got a real vacation. Even in Hawaii, she was making those bratty kids sandwiches and doing their laundry for them.