According to Monetary Authority of Singapore, commissions elict a self-interest culture:

"...having remuneration structures that rely primarily on commissions, or which are biased towards rewarding staff for recommending certain investment products is untenable. It will inevitably elicit a culture where the institution and its representatives are more concerned about their own revenue interests, as opposed to having clients’ interests at heart. Financial institutions will have to review the way in which they deal fairly with clients, to provide real value and restore confidence." - MR NG NAM SIN, Executive Director of MAS. Source: HERE