Verb
grease the wheels (third-person singular simple present greases the wheels, present participle greasing the wheels, simple past and past participle greased the wheels)
(idiomatic) To create conditions likely to produce or hasten favorable future developments.
Although most Americans apparently loathe inflation, Yale economists have argued that a little inflation may be necessary to grease the wheels of the labor market and enable efficiency-enhancing changes in relative pay to occur without requiring nominal wage cuts by workers. Janet Yellen
The topic of trust is an important factor in all matters of the heart - and here's why. Men lie to women. Women lie to men. And most people agree that some lying is even necessary - to avoid petty squabbles and to grease the wheels of a relationship. Joyce Brothers
To make the cart go you must grease the wheels. Italian Proverb
You must grease the wheels if you would have the car run. Italian Proverb