Is your wife eating enough calories to make milk?
This is normal behavior of a newborn. She is just prepping Mommy's body for milk. My baby (now 3.5 mos) used to feed for 1.5 hours when she was under a month old! We had latch issues and called a consultant who classified her as a high-needs baby. She likes to be held a lot. By Day 15, everything got easier. I really think a hormonal thing occurred with me because that day felt so amazing. My "blues" disappeared and my appetite came back. I think MY issue was that I wasn't eating enough to make milk and my daughter was always hungry as a result. Pre-pregnancy I ate 3 meals a day, snacked 2x. After labor, I ate 2 meals a day. So you might want to check that.
Breastfeeding is a Lifestyle Choice
We exclusively breastfeed our baby. It's REALLY easy to quit those first 2 weeks. If my husband relaxed about it even just a little, I think we wouldn't be doing it anymore. When I'd complain, he'd just listen and tell me that I'm doing a great job. He wouldn't hint at letting me off the hook. It was such a frustrating time. I've gotten used to it now. They say you shouldn't bottle feed for fear of "nipple confusion" before 6 weeks old. We've bottle-fed our babe 6-7 times before a month old and she never got confused. If your wife breastfeeds a majority of the time, the baby will not get confused. Keep supporting your wife and let her know that you are there to help. You can also feed the baby breastmilk via dropper or spoon feed to give your wife a break.
The Babywise Method by Gary Ezzo for scheduled feedings and sleeping
I have not tried this personally because I had bought enough baby books that I never ended up reading :) So baby and I are attached to the teet but I digress.
A friend of mine and his wife had much success with this method. It's a flexible schedule for feeding and eating. There is a lot of criticism out there for it but make your own opinion and see if it fits your lifestyle. So long as baby has enough poopy and wet diapers, she is getting enough nutrients.
Keep in mind that the younger they are, the smaller their stomachs are so they get full and hungry faster. Good luck!