Income as a budget category

I tag my income with things like Salary, Parents, etc., and I want to be able to set up a budget categories for income that I can track with the normal expense categories on the Budget screen. Having a budget for expenses is more useful when I can compare my expected/allowable expenses with my expected/actual income. I know I can view my actual to-date income on the Reports screen, but I would like to be able to enter expected income on the Budget screens as well, so I can easily make sure my planned expenses for the month do not exceed my expected income for the same period.

I generally treat any positive difference between income and expense from the previous month as savings, so don't really use the rollover feature. With a combination income/expense budget feature, under-budget values from previous months could accrue to both their respective expense categories and a rollover category to keep things balanced.

I love being able to change my budget on a monthly basis without affecting previous months, but not being able to track my expected income the same way is a major stumbling block for me. If this is already a "feature" but just takes a little creativity to implement, please let me know!