[franga2000]

But this is the exact issue you have with IT outsourcing - instead of taking the obvious and sustainable solution, there's a clause somewhere in the 500 page requirements doc that doesn't even make any sense, but means you have to use something nonstandard and even add some of your own hacks on top. Because it's a tender, you can't really change the spec and you don't care to either, because a terrible bodge means they have to go back to you whenever it needs changes/fixes.

An in-house development department on the other hand doesn't have to stick to the strictly disconnected way of tenders and the development team can actually work with the stakeholders to develop and evolve the spec throughout the project. They also don't need to guarantee future business for themselves through vendor lock-in or boost their corporate partners through technology choices.

This is an unprecedented case where a private company decided to go the open source route for a government project, usually it's only the in-house teams that pick open source.