This should NOT be considered when setting a current budget
Future income
Explanation:
Future income can be anticipated but never factored in.
This is because the economy is not only controlled by economic policy or statistics that anticipate growth but outside influences too.
For example, despite the productive growth in the recent time there will be decrease in incomes throughout the world this year.
This is because of the recent crisis that was not foreseen at all.
Thus policy making must not see the future as anything granted and must only set up goals for the present and only anticipate what would probably come in the future.