That's a good point.
Ideally, there would be a budget that would happen earlier in the cycle—for example, in February—so that budget items would be reflected in the main estimates. As that is the vehicle through which the government finances its operations, you then as parliamentarians, when you review the main estimates, would be able to make the connection back to budget items, as opposed to having main estimates that are not complete and that do not paint a complete picture of the government's finances and so do not include the budget estimates.
You'd have a much easier job, I would say, of approving or scrutinizing government expenditures, or the government's requests for money that would include budget items, which is currently not the case with the budget tabled way after when the main estimates have to be prepared and tabled.