In the verse below the Apostle Paul explains the kind of work ethic that slaves should have. I believe that these principles apply to paid employees as well:
Slaves, obey your earthly masters in everything; and do it, not only when their eye is on you and to curry their favor, but with sincerity of heart and reverence for the Lord. (Colossians 3:23).
First of all, we need to obey our bosses in everything. I believe that there may be a few exceptions to this, like, for instance, if your boss orders you to do something that is clearly immoral, such as perform a sex act (Genesis 39:7-20), or do anything else illegal. But usually you need to obey your boss’ orders both in spirit and in the letter.
Secondly you must work hard not only when their eye is on you, but all the time, whether you are under surveillance or not.
Thirdly, you must not work simply to curry their favor. That is to say, your focus should not be on trying to make yourself look good in front of your boss, but on doing your best possible job because you truly care. The two of these are not always the same things. Some employees focus on manipulating numbers in order to make themselves look productive, but the best employees are concerned more with doing what is truly best for their company than with what looks good on paper. You should work with sincerity of heart and reverence for the Lord.
Ultimately, your work ethic must be motivated by your desire to serve God. True believers honor God by honoring their employer. You must not let the amount of money that you are paid on Earth dictate how hard you work. You must work your best regardless of the pay. Your motivation should be the knowledge that God Himself will reward you for your good effort:
Whatever you do, work at it with all your heart, as working for the Lord, not for human masters, 24 since you know that you will receive an inheritance from the Lord as a reward. It is the Lord Christ you are serving. (Colossians 3:23-24).