Answer:
grease payment
Explanation:
According tot the given statements the $20 is an example of " a grease payment ".
A grease payment is the bribe which is relatively very low in amount.
This is the amount paid to business person or to the lower level government official so as to alter the decision or ease out the process of some work.
The phrase invisible hand was introduced by Adam Smith in his book 'The Wealth of Nations'. He assumed that an economy can work well in a free market scenario where everyone will work for his/her own interest.
Mayflower compact