What Economic Principles Justify A Lack of A Living Wage?

Mods, I promise this isnt a loaded question. A genuine question regarding the economics of a theoretical living wage.

I've always wondered why there isnt a living wage in the US, outside of artificial reasons. By that, I means simply "because they can" or just simple greed.

MIT has a living wage calculator, which imo is a little low, but they have done it by county in the entirety of the US. So the calculations can be done.

In my opinion, a living wage is one in which a wage for a given area can cover the median costs of an area, rent, utilities, food, insurance, etc for one single person.

It really feels like there isnt any good economic reason for this. California bumped up wages in one sector by something like 18%, and the genrral price increase to cover this was only about 3.7%.

Other data I look at says that raising the minimum wage barely negatively affects the amounts of jobs. And yes, less jobs is bad but if it only mildly hurts the job market, I fell the benefit outweighs the negatives.

Is there really any good, economic reason why the lowest payable wage in any given area of the US isnt enough to live for one single person in that area?