Politicians have nothing to do with - Pounds do.
Let's be fair to Angela, she only knows what she's told by her political adviser, who only knows what he's been told by the PPC, who only knows what he's been told by, and so on until we get to the technical people.
Ultimately it's down to Money, there is a thin called eGiF which has been around for years that states that Citizen services should not be tied to one technology. Originally you had to make all web forms compatible with Netscape and IE.
I pointed out a long time ago to various Project Managers that there was a world outside Windows, but their attitude was, well I don't know anybody who uses X, when asking the clients they always stated that we should follow eGiF, but once the costs started escalating for testing on Macs, Linux and others, well just test it on a couple of browsers under windows. But then the desktop policies wouldn't allow Netscape. Actually it isn't always as bad as that but you can guess the arguments you have to go through. Remember politicians in the UK only have to keep 40% of the electorate happy, and the Civil Service has to show value for money, don't think Macs and Linux have enough traction yet that the cost of supporting them will be acceptable. Also remember who develops these systems, we only have to look at some of the Linux v Mac v Windows zelots comments to see that Windows developers, just don't think outside IE without the use of thumbscrews, and most development platforms are Windows.
It's funny though how many of the oh well most people use Windows brigade now use Macs at home because the get fed up with constant patching and virus upgrades.
I'll be joining them at my next PC upgrade. Oh, and for you Linux lovers, my home servers going that way as well, when I have time.
So don't just have a go at Angela, fun though it is, have a go at, The Treasury, the Public Accounts Committee, OGC, The SIs, The techies, and the buying public, we're all responsible.