Original sentence: As the main instrument for improving the economy, Krugman advocated promotion of spending on housing and other durable goods with low interest rates.He also proposed increased government spending on infrastructure, military operations, unemployment benefits, and income subsidies for lower-income families and argued that these policies would have a larger impact in providing short term stimulus and promoting economic recovery than tax cuts, and would only temporarily increase the budget deficit
Edited sentence: Krugman advocated lower interest rates (to promote spending on housing and other durable goods), and increased government spending on infrastructure, military, and unemployment benefits, arguing that these policies would have a larger impact stimulus effect, and unlike permanet tax cuts, would only temporarily increase the budget deficit