I want Google search in mobile IE9

Why doesn't Microsoft let users change the search engine in IE9 (for when searching in the adress bar), or the search button that's on all Windows Phones? I understand that they want everyone to use Bing of course, but I don't think many people like it. Bing works fine for simple searches (e.g. for a popular website, big corporations) but when you're searching for something that isn't that it simply doesn't cut it.

Remember when the European Commission investigated MS for bundling IE in Windows? Well now they're shipping phones with a dedicated Bing search button and isn't that just as bad?