Eleison - No idea what the models for magazines get (posing with gadgets and cars, for example) but there's surely quite a number of 'publicity' related jobs which you'd also need to stop, because, let's face it, at lots of exhibition halls up and down the country, [young] women are paid to hand out leaflets, sell exhibition guides, and/or pose with fast cars etc.
How many adverts seen on the posters up and down the London tube escalators include some model in skimpy clothing, and how many TV ads suggest some degree of sexual "success" from using certain products (thought that was banned so I suspect it depends on the type of claims being made).
It's one thing to try to stop Page 3, but how much further would you need to go - would you wipe out all promotions jobs too? It's been the same for many hundreds of years that sexy sells, and while a massive proportion of women would not take those jobs, just as they would not consider lap dancing or working in a strip club, there will always be plenty of women in advertising and I suspect in lots of other jobs where 'presentation' may be exploited to get a deal/make a sale, whether it is a sales representative for some firm, the receptionist one first meets, or the staff on aircraft, cruise ships, and so on.
Yes, it is wrong, and I don't know whether such jobs are less likely in Norway (where there is legislation in place to make company boards more equal and presumably this has consequences all the way down in businesses and thus alters advertising policy, and so on), but it is a radical change that may take another 20, 50, 100 years.
(NB I am not trying to associate work on aircraft or cruise ships, let alone promotions staff at exhibitions, with stripping or lap dancing, but at the same time I respect the right of women who work in lap dance or strip clubs to do as they choose, as long as it was done with a free will.)