According to the California Voter Guide, Prop 38:
"Increases taxes on earnings using sliding scale, for twelve years. Revenues go to K–12 schools and early childhood programs, and for four years to repaying state debt. Fiscal Impact: Increased state tax revenues for 12 years—roughly $10 billion annually in initial years, tending to grow over time. Funds used for schools, child care, and preschool, as well as providing savings on state debt payments."
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