Businesses need really good people in charge of financial appraisals. Why? People in charge of projects tend to naturally overspend as they view their projects as the most important ones in the company and justify anything they think they need to build them and put them in place.
You really want people with that attitude in charge of projects as they are likely to get results. At the same time, you can't let them run loose and overspend. Someone needs to keep them within their budgets and financial appraisers can do just that.