Governments do worry about costs
I recently had an interesting discussion about the huge amounts of money that governments spend on IT projects. The US government alone, for example, has spent over $1 billion on PKI and doesn't seem to have $1 billion of value to show for this investment.
In this discussion, I claimed that the government just isn't sensitive to costs. The other person, who happens to be a government employee, claimed that I was wrong. He claimed that governments are indeed sentitive to costs – they're just not sensitive to bad ideas. That's a distinction that I hadn't heard before.