Federalism
It doesn't quite work that way. The States and their people ARE the government, and they have allowed the Federal government to do a very few things like regulate sales of items between and among the States, provide a military to protect all of the States, and to mint money.
Your question actually states the reason because there are things that they have to share. We have a national highway system and this is the United States not a state by state of little countries . The federal government is the government for all people.
It is difficult to make a blanket statement about what the government may or may not be hiding as it can vary depending on the government and the context. Governments may withhold certain information for reasons of national security, diplomatic relations, or to protect sensitive information. Transparency and accountability are important principles for governments to uphold.
The national government is obligated to support the state governments in case of an emergency in that state. The national government also should no infringe on state powers.It divides power between a National Government and State governments. The obligation of the National Government to protect the States against invasion.
the government that takes care of things that need to be done state wise.
I'm assuming you mean all the levels of government. If that's the case, there is the Federal Government, state governments, and local government. The specific type of local government varies by state, but covers things like county and city governments.
Federalism divides power between the state and national governments. The separation of powers ensures that in both state and national government each branch of government is responsible for certain things and each branch of government balances each other.
The national government's control of immigration is an example of Inherent Powers. An inherent power is an authority that isn't passed down from anyone else, but which is naturally (inherently) yours. In governments this is often interpreted as the authority to do things that aren't delegated by the constitution or laws to anyone else.
governments want to be free .
Each level of government in the U.S. has distinct responsibilities. The federal government handles national defense, immigration policy, and foreign affairs. State governments manage education, transportation infrastructure, and public health. Local governments focus on community services such as law enforcement, zoning regulations, and local infrastructure maintenance.
Things the governments provides include: Defense, Healthcare, and Infrastructure.
Keeping in mind that all governments are different in countries around the world, two things that most governments spend tax money on are:transportation and roadspolice and military