I think this is a good example of a very silly word. There is nothing wrong with "healthy". We can talk about a company's finances being healthy as well as a healthy appetitite or a healthy sum of money. Let's leave healthful in the gobbledygook book where it belongs.

I would also like to raise the issue of other silly words along the lines of transportation used instead of transport, for example, (in the simple case where they have the same meaning) this leads to the creation of unnecessary words along the same lines as "to transportate", or words along the same lines as the term "transportationise/ize". Why is there such a tendancy to make a new longer word when a perfectly acceptable short word will do the job?