I think that assumes that the market is rational. Could it not be an indicator of increasing corruption instead?
A banker gets paid to allocate capital, manage risk, and so on, and gets to share in some profits as an incentive to make the correct decisions. Take the reward and allocate it towards bribing politicians to remove restrictions on banking, accumulate more money, spend more money on "lobbying" or "campaign contributions" (that is, more bribery). Lather, rinse and repeat for 3 decades or so, and suddenly you're not being paid a rational amount for improving market efficiency, you're just bleeding off money from the economy. Become "too big to fail", reap the rewards of risky investments that pay off, dump the cost of failed investments on the public purse, reinvest the money to skew regulations in your favour even more, profit.
A banker gets paid to allocate capital, manage risk, and so on, and gets to share in some profits as an incentive to make the correct decisions. Take the reward and allocate it towards bribing politicians to remove restrictions on banking, accumulate more money, spend more money on "lobbying" or "campaign contributions" (that is, more bribery). Lather, rinse and repeat for 3 decades or so, and suddenly you're not being paid a rational amount for improving market efficiency, you're just bleeding off money from the economy. Become "too big to fail", reap the rewards of risky investments that pay off, dump the cost of failed investments on the public purse, reinvest the money to skew regulations in your favour even more, profit.