I think that economic policy is going to mirror the aggregate economic literacy of the public.
Some problems with credentials.
-we are a hierarchal class based society and education is valuable; consequently it will be walled off to those with lesser resources
-at higher levels you begin to encounter the problem that individual X is simply not smart enough to understand the material, and I think this would remain even if class barriers were removed. Some people are not as quick.
In either case, those that lack optomal understanding still contribute to political power and influence, and will get their way some of the time. Self-interested counter elites are bound to exploit the knowledge gap to political power, and this is particularly so because those on the lesser end will often feel they've been cheated(see conspiracy theories, feelings about bankers generally)
The solution is to reduce the political influence of the credentialed. I think this is most important. In business, it means allowing workers a greater voice, via either the labor union or a rethink of the ultimately rather feudal corporate structure. In politics it means removing class barriers. If the knowledge gap is certain, a trust gap cannot also be present or the credentialed simply will not lead, they will meet too much resistance.
...at present this means the credentialed will need to suffer a few reductions, willingly, in terms of social influence. The trust gap is already wide and grows wider.