As an additional comment—not instead of the Comptroller General's comments—from the point of view of parliamentary control, Parliament may wish to allocate the tax resources available to it differently, and voting amortization does allow Parliament to essentially remove the ability of the government to continue to own an asset. So the wording of the votes would have to be crystal clear as to what not providing the amortization means, but governments can dispose of assets.
Part of the question here is, does Parliament wish to have the ability to essentially force this by not voting automatically for amortization, as you said? It's this point, in terms of expenditure management and oversight, that we want to have.