The founders were very wise and knew for the US to survive it needed a moral compass. We can thank them for this foresight.
John Adams in a speech to the military in 1798 warned his fellow countrymen stating, “We have no government armed with power capable of contending with human passions unbridled by morality and religion . . . Our Constitution was made only for a moral and religious people. It is wholly inadequate to the government of any other.”
Benjamin Rush, Signer of the Declaration of Independence said. “[T]he only foundation for a useful education in a republic is to be aid in religion. Without this there can be no virtue, and without virtue there can be no liberty, and liberty is the object and life of all republican governments. Without religion, I believe that learning does real mischief to the morals and principles of mankind.”
Noah Webster, author of the first American Speller and the first Dictionary said, “[T]he Christian religion, in its purity, is the basis, or rather the source of all genuine freedom in government. . . . and I am persuaded that no civil government of a republican form can exist and be durable in which the principles of that religion have not a controlling influence.”
James Wilson, Signer of the Constitution; U. S. Supreme Court Justice, “Human law must rest its authority ultimately upon the authority of that law which is divine. . . . Far from being rivals or enemies, religion and law are twin sisters, friends, and mutual assistants. Indeed, these two sciences run into each other.”
George Washington, General of the Revolutionary Army, president of the Constitutional Convention, First President of the United States of America, Father of our nation, " Religion and morality are the essential pillars of civil society."
Benjamin Franklin, Signer of the Declaration of Independence “[O]nly a virtuous people are capable of freedom. As nations become corrupt and vicious, they have more need of masters.”
“Whereas true religion and good morals are the only solid foundations of public liberty and happiness . . . it is hereby earnestly recommended to the several States to take the most effectual measures for the encouragement thereof.” Continental Congress, 1778
Bottom line - Christianity produces more self governing of its people and obviates the need for big government. As we drift away we will need more enforcement and more laws.