What is the best type of budgeting method for a law enforcement agency

What is the best type of budgeting method for a law enforcement agency, and specifically why? What are the strengths and weaknesses of this type of budget?
Note: This will require research outside of the provided readings. Keep in mind one might suggest a zero-based budget, incremental budget, activity-based budget, value proposition budget, flexible budget, etc.
What is more stressful for the police officer – working the street or dealing with the agency administration? Why so? What can be done by the police administrator to reduce this stress felt by officers?