The purpose of trying to budget is to stop living from paycheck to paycheck. There might be some people for which this will not work, but the ones leasing new cars every few years (or signing overpriced contracts because of the "free" phone every two years) are not among them. I am sure that many people in such circumstances could find little things that could be cut if they looked (e.g. Cable TV, the landline phone, etcetera). Such things add up.
I have been applying such things to my parents' budget. Just the other day I heard from my mother that she no longer worries when unexpected medical expenses come up because she has found that the savings that my suggestions made more than paid for it. She gets TV for free OTA, replaced her expensive landline with free VoIP through Google Voice using an Obihai ATA, has lower electrical consumption (from various things, but the simplest being putting a lid on the frying pan to reduce evaporative heat loss, which is an efficiency improvement that allows food to cook faster), has a promotional rate for the newspaper she insists on having, has cell phone service that has no monthly fee (through ring plus), obtains heating oil at COD pricing, etcetera. Such things add to a four figure amount each year.