All of the listed policies can be used to some extent to redistribute income from high-income earners to low-income earners. However, the most direct policy among the options provided specifically focused on income redistribution is:
negative income tax
This policy provides financial assistance to low-income earners through cash payments, effectively redistributing income by ensuring a certain income level for individuals and families. The other options, while beneficial for low-income individuals, are more targeted support programs rather than direct income redistribution measures.