Economy of scale would have suggested otherwise. But while the market is booming, not too many are complaining. However, once the market calms and returns moderate, expenses will finally become a major focus of investors- particulary those investing in bonds. Since bond returns are traditionally based on the stated yield, high fees simply take away from an investor's return without, normally, providing anything additional of value. These are extra fees levied on mutual funds for the additional marketing by the fund after the purchase.
Bond funds are little different.
With a stock fund, you may get enough gain to offset the fee. With a bond fund, that is nigh on to impossible so you are always behind the eight ball. At first glance this doesn't make sense, but when you add in the psychology of various investors, it becomes very clear as to what is happening. While I might rail at the fact that brokers have little training, it is still usually greater than that of the average investor. This increased understanding of the marketplace normally dictates that monies stay invested for longer term growth rather than going in out and attempting market timing as many individual investors to.