Budget: Allow users to budget against last month's actual income rather than the current month's planned income

Currently EveryDollar is set up so that, for a given month, you are spending against the planned income for that month. This is a hypothetical number that often changes. I prefer to spend against my actual income, down to the penny, that I received from the previous month. At the end of the given month, the exact amount I have unspent I move to my investments or the exact amount I have overspent I move to the next month as an expense, that way I am truly spending Every Dollar (and penny) that I received.

Please add a feature where users can choose between the current set up and the one that I am describing, where instead of having a planned income section you just have an "actual income from last month" section.

I would be happy to describe this in greater detail if there is interest.