Another model is UBI and government as employer of last resort (or a equivalent strong labour movement). If there is an employer who can absorb all applicants at a minimum wage, then the market floor is pushed up.
Remember, a living wage is the minimum all-in cost of labour. If you're operating a business which cannot afford to pay a worker what they need to survive, you're not operating a business, you're operating a charity supported by your workforce (or social welfare systems).
If you can and fail to, you're simply pocketing profits from the public purse.
This is straight-up Adam Smith: "A man must always live by his work, and his wages must at least be sufficient to maintain him. They must even upon most occasions be somewhat more, otherwise it would be impossible for him to bring up a family, and the race of such workmen could not last beyond the first generation."