Income is a synonym of Take. Take is related to Reduce. 
Commitment is a synonym of Ought. Ought is a synonym of Want. Want is related to Waste. Waste is a synonym of Desert. 
Income <--Synonym--> Take <--RelatedTo--> Reduce 
Commitment <--Synonym--> Ought <--Synonym--> Want <--RelatedTo--> Waste <--Synonym--> Desert 