It sounds that funding agencies require proposals to provide support for research. However, most of the evaluators of the proposal are not working in the same research area, and they fail to understand the clear contribution of the proposal especially if it is a deep rooted concept. This also applies for scholarships and PhD award programs as well. Thus, such a system will benefit those who are not knowledgeable in their research area which I believe is unfair.
One may claim that the reason could be a luck of expertise in the area. However, this can be circumvented by requesting detailed information about the candidate. For example, one of them is by checking the peer review comments of the previously published papers from the reputable journals.
Please note that these agencies are closely working with the academic excellence communities. And I believe that having detailed information about the candidate will help for accurate decision.