“I wanted to spend a bit of time on the Labor Department’s proposal to place a fiduciary obligation on those who manage or provide investment advice on retirement plans. These include individual retirement accounts and 401(k)s (including 403(b)s). The new rules require the broker or adviser to “operate in the best interest of the client.”

“I don’t want to rehash all of the reasons why this is a very good idea — I did that last year in an article with the headline “Find a financial adviser who will put your interests first.” Instead, I want to explain why fiscal conservatives should rally around this idea as a way to hold down taxes.

“I first discussed the lack of a fiduciary duty in 2013. The context was a proposal in the U.K. that was going to cap retirement-plan fees. Those rules were passed, and starting in April, annual charges on British workplace pension plans with automatic enrollment are capped at 0.75 percent.

“The conservative ruling party in the U.K. did this to save future taxes, as you will see below.

“The proposed fiduciary rules are not an explicit fee cap, but they would require that “any fees and costs paid by the client be reasonable for the services provided.” It is probable that the “best interests of investors” will mean that fees will be reduced from today’s often-excessive levels. If you doubt this, then perhaps you might explain why Wall Street has spent millions of dollars lobbying against the fiduciary standard. They KNOW just what the net result will be — lower fees to brokers and advisers.”

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Read the full Bloomberg View article by Barry Ritholtz here.