Why are business expenses deductible from income, but someone’s basic living expenses aren’t deductible from personal income?

Question

Why are business expenses deductible from income, but someone’s basic living expenses aren’t deductible from personal income?

In: Economics

Answer 1

Your living expenses don’t contribute to you earning income. Or at least not most of them. 

I mean some are, which are what you can deduct (like a laptop you use for work, or clothes, or whatever). 

But you grabbing 8 pints and 4 burritos at 3am on Saturday aren’t really for work purposes. 

A business basically doesn’t have personal expenses (because it’s a business) so basically all expenses are deductible (and even more depending how good your accountants are).