Maybe. The difference between 40k and 50k sounds small in terms of raw percentage, but if you consider disposable income, it's more significant. What I think you'd much more likely see is an increase in part time work. In your scenario, likely nobody would be willing to work full time as a cashier at Walmart. But they would work part time if they wanted to save up for a new car, for example.
If the labor pool can support it, I think that's as it should be. The neat thing about the minimum guaranteed income is how well it scales as we automate jobs in the future. If we no longer need very many people working jobs at the skill level of Walmart cashiers, then raising the minimum income will account for that relatively painlessly.
But it's obviously not something you can just slap into place. You have to analyze the problem to figure out both how to set the minimum income initially, and how to adjust it over time.
If the labor pool can support it, I think that's as it should be. The neat thing about the minimum guaranteed income is how well it scales as we automate jobs in the future. If we no longer need very many people working jobs at the skill level of Walmart cashiers, then raising the minimum income will account for that relatively painlessly.
But it's obviously not something you can just slap into place. You have to analyze the problem to figure out both how to set the minimum income initially, and how to adjust it over time.