The subjects of every state ought to contribute towards the support of the government, as nearly as possible, in proportion to their respective abilities…
The Wealth Of Nations, Book V Chapter II Pt II, v. ii, p. 825, para. 3.
In this quote, Smith is saying that everyone should work together to help achieve a certain goal that they can benefit from in the end. It doesn’t have to be the government. It can be something else that’s simple. An example of this quote is when a group of people come together to make food. They all work hard and benefit from their hard work.
Public services are never better performed than when their reward comes in consequence of their being performed, and is proportioned to the diligence employed in performing them.
The Wealth Of Nations, Book V, Chapter 1, Part II, p. 719, para. b20.
In this quote, Smith is saying that people who work for people work better if something might get taken away from them. An example is if a boss tells an employee that if they don’t serve well than they will be fired. The person fears that and they work better.
Every tax ought to be levied at the time, or in the manner, in which it is most likely to be convenient for the contributor to pay…
The Wealth Of Nations, Book V Chapter II Pt II, p. 826, para. 5.
In this quote, Smith is saying that it is easier to pay at once than when it is convenient to you. If you pay all at once, you don’t have to worry about having to pay over a long time. The problem with paying at once, you could run out of money fast.