MBJ I too thought the same thing when I started feeding my bluegill. As I had the same goals in mind big bass... Well I been feeding AM since 2010 and we all know that's stuff isn't cheap... Here are my pros and cons to it.
Pros. 1. Promotes good health in fish which is then trickled down to the bass that eat the healthier BG.
2. BG if given the better food I believe will be more active and spawn even more for you in the long run which will give you even more baby BG. Remember like it or not you have to have some breeder BG or they WILL NOT keep up with your bass chowing down on them all the time and bass can chow down!!! So the more they spawn the better.
3. And I know this is not your goal but you can end up with some sweet fun fighting 10 inch BG. Trust me I too have 2 boys. And they get impatient fast trying to catch bass that just sometimes wont bite, but they will have a blast catching them big BG on a 4 foot rod when the bass bite is slow.
Cons:
1. Food is more pricey of course and that's about the only con I can think of.
Trust me you can have the best of both worlds. I have 10 inch plus BG and I have 3 to 5 pound LMB and 6 pound HSB. Now if you want 7, 8 pound plus LMB you may have to add extra fish in the pond anyway as it takes a TON of bait fish / large BG / Shad to get LMB in the 8 plus pound range.
Anyway just some food for thought... ha no pun intended...
RC