The dubious quality of lenders' loans sourced through mortgage brokers is one alarm rung by ASIC after an exhaustive review of the broker commissions.The standard commission model of upfront and trail commissions "creates conflicts of interest," the Australian Securities and Investments Commission concluded in a review requested by the federal government in late 2015.This model could, ASIC said, "encourage brokers to place consumers in larger loans, even when this may not be in the interests of the consumer." ASIC also proposed that "lenders do not structure their incentives in a way that encourages the creation of larger loans that initially have large offset balances."Brokers and aggregators (including ASX listed entities such AFG, Mortgage Choice and Yellow Brick Road) may find their revenues hurt by other suggested measures.Two of these are that the industry moves away from "bonus commissions and bonus payments" and from "giving soft dollar benefits." Both recommendations are in line with thinking behind recent reforms of payments to financial advisers.The need for detailed disclosure on commissions paid and even average interest rates on loans sourced through different channels is another key theme of ASIC's review.This will cover: the actual value of remuneration received by aggregators and the potential value "if all criteria for remuneration are satisfied"; the average pricing of home loans that brokers obtain on behalf of consumers; the average pricing of home loans provided by lenders according to each distribution channel; and the distribution of loans by brokers between lenders to give consumers a better indication of the range of loans that brokers within the network offer.ASIC shared versions of that data in its report.Lenders paid around A$1.4 billion in upfront commissions on $175 billion of home loans in 2015, compared with $729 million on $98 billion of home loans in 2012.Lenders also paid $984 million in trail commissions on an average outstanding balance of $545 billion of home loans in 2015, compared with $733 million on an average outstanding balance of $380 billion of home loans in 2012.ASIC reviewed data on 1.4 million individual home loans plus sales and commission information on over $550 billion of new home loans for its report.