Having a full time nanny would be as you described, in my eyes.
But you can have someone clean your flat/house, someone do the gardening, someone doing your taxes. Have someone cook for you. And thus have more time for your kids and still have more free time.
What about a part-time nanny? Few hours a week of paid time off for parents doesn't feel like it would diminish the parents/children bond in any way - but parents get some rest (or a chance to work on their own relationship, or even to catch up with chores), the kid gets someone new to play with, and then slightly less tired parents.
Think someone like Alice the live-in-maid from The Brady Bunch. Yes, she was part of child rearing, but Mike and Carol were there too. Granted, it's a saccharine sitcom of total unbelievableness from the 60's.
But you can have someone clean your flat/house, someone do the gardening, someone doing your taxes. Have someone cook for you. And thus have more time for your kids and still have more free time.