They say single, so I assume they also mean living alone. Being able to pay rent etc on your own without roommates. Still, while I skimmed the article I didn’t read all the nuance so I might have missed where they specified their parameters.

Edit: found it:

In Hawaii, the living wage for single workers is $112,411 — the highest in the U.S. — according to an analysis by personal finance website GOBankingRates.com. To determine the living wage in each state, GOBankingRates calculated the minimum amount a single person would need to follow the 50/30/20 budget, using data from Bureau of Labor Statistics.

Following this outline, 50% of income is used to cover necessities, such as housing and utility costs, 30% goes toward discretionary spending, and 20% is left for savings or investments.