Sorry, what's your point? People do have many unpredictable expenses. But managing the ones you can (like food costs, and bills, and housing costs) does a lot to reduce your monthly spending, which is half of the equation.
Increasing earnings gives you more money today.
Decreasing spending gives you more money today, and more money every time that you act on that same habit. Cutting your rent doesn't just put cash into your wallet now, it also decreases the amount you need to save to live (or retire) at your current lifestyle.