"The slave drivers kept pressing them, saying, 'Complete the work required of you for each day, just as when you had straw.' And Pharaoh's slave drivers beat the Israelite overseers they had appointed, demanding, 'Why haven't you met your quota of bricks yesterday or today, as before?'" NIV translation
The slave drivers were responsible for getting the work done and had to answer to Pharaoh. They had appointed overseers to get the slaves to do their work but they could not keep up and gather the materials that were required.
The overseers would have been the equivalent to the tax collectors of the New Testament. They were a part of the system that exploited their fellow Israelites and were probably despised in the same way.
"Then the Israelite overseers went and appealed to Pharaoh: 'Why have you treated your servants this way? Your servants are given no straw, yet we are told, "Make bricks!" Your servants are being beaten, but the fault is with your own people.' Pharaoh said, 'Lazy, that's what you are - lazy! That is why you keep saying, "Let us go and sacrifice to the Lord." Now get to work. You will not be given any straw, yet you must produce your full quota of bricks.' The Israelite overseers realized they were in trouble when they were told, 'You are not to reduce the number of bricks required of you for each day.'" NIV translation
The overseers appealed to Pharaoh but it was no use.
That reminds us of the fact that, we all must make a choice of whether we are a part of the world or a part of Christ. There is no room for people sitting on the fence like the overseers or tax collectors.
"When they left Pharaoh, they found Moses and Aaron waiting to meet them, and they said, 'May the Lord look on you and judge you! You have made us obnoxious to Pharaoh and his officials and have put a sword in their hand to kill us.'" NIV translation
As we have seen, the devil uses busyness to attempt to draw God's children away from Him. It leads to a lack of faith and worship of God which in turn creates conflict with those who are trusting in the Lord.