yytz: The Rav said this many times and you can hear him stress this point on many of his tapes. Obviously he felt strongly that this is the proper way both from a halachic point of view and from a point of having a proper and traditional marital relationship. I don’t even think Rabbi Arush is disagreeing with the gadol. She can be in charge of financial matters on behalf of her husband the same way a company treasurer or accountant is in charge of corporate finances on behalf of the owners and not himself.
bym: The rav said this actually promotes and enhances shalom bayis. From personal experience and from speaking with many others I find that he is very correct.
Also, you misconstrued Ben Levi. Previous generations, unfortunately, weren’t financially or otherwise capable of meeting the ideal Torah scholar scenario. Now that we are able to, certainly we should as much as possible.