I currently make mid 5-figures/month and spend less than $1,000/month.
Here's what my budget looks like:
$200/month -- Food -- I get fruits, vegetables and poultry delivered by Safeway. Once a week, $50 each time.
$125/month -- Health Insurance Premiums -- Employees get H.I through their employers (add that in to their wages)
$35/month -- Virgin Mobile cell service
$19.99/month - Internet
$400/month - Rent (because rooming saves money)
$0/month - Car
$0/month Car insurance
$0/month Cable TV
$<$50 Entertainment
If I was literally working at McDonalds I would:
Switch to pay as you go cell service and only use it for important calls.
Cancel my internet (McDonalds has free Wi-Fi

)
I'd stop buying organic food and only buy in-store (delivery cost $6)
I'd rent a tiny room -- cut my rent down to $200 - $300/month.
Use only public transit
And this would all last a few months before I went through a temp agency or somewhere that could get me a new job ASAP that pays better.
Or, I could be stupid, sit at McDonalds, complain all day, shake my fist at the sky and think the world owes me something.