What do you mean exactly? I agree that they can hide money quite easily in it because they can do favors and then accept crypto as a means of payment. There's always a way to return a favor, and crypto happens to be a more convenient one because it's not easily traced.
But in terms of blockchain for budget, you mean they won't be able to tunnel funds out of it so easily? Or they won't be able to misdirect it, and spend it somewhere else? Couldn't they still spend it in favor of certain interest or lobby groups if they wanted?