Think it widely, at national level.
Government earns its revenue in form of taxation.
It uses it to improve well-beings, social security infrastructure etc.
That's the reason taxation will influence residents' daily life.

For your second question,
if entity has to pay heavy tax, it has less cash to distribute as salary, hourly pay check etc.
You may call it indirect influence.
That's pretty straightforward, isn't it?
Thanks.

谢谢，第二点中，企业所得税是对企业扣除工人工资等成本后的收入征税，那是这样理解吗，税收高了，本年度的税后收入降低直接影响下一年度的员工工资了，而企业税收收入下降，意味着投资者的收入也降低了。这样富人的收入就下降 了

You are very smart.
All happened in the same time slot.