It can be combined with a Federal jobs guarantee, where the Federal govt becomes a job provider of last resort. This sets a wage floor rather than a minimum wage and give real bargaining power to workers. I like this idea better than Universal Basic Income, because it prevents workers from becoming lazy and subservient to the state. Also, a lot of people find purpose through their work, so this helps people from losing meaning in their lives. The actual work to be done can be determined by each community, which knows best about what work is required (e.g. child care, landscaping, etc.).

It actually just means that the business needs to charge more for whatever it produces. For a restaurant, for example, the general guideline seems to be that 30% of the costs are labour. So increasing the wages by 20% means costs increase by 6%.

If a business can't survive that then the business simply isn't viable.

Why exactly should we expect people to work below a livable wage just to keep a non-viable business afloat?