The Union was formed as a confederation of States that joined together voluntarily. It was the States that joined together, not the people.
The Founders saw the States as checks on the Federal government. They understood that the Federal government would attempt to assume more power than it was granted by the Constitution. So the Senate was devised in Article I, Section 3 in such a way as to give the State legislatures Senate-appointing powers. This made the Senators accountable to the States rather than special interests.
The War of Northern Aggression (aka the Civil War) took away one check the States had on Federal overreach: secession. The 17th Amendment took away the other. (As an aside, Obamacare would never have passed if not for the passage of the 17th Amendment.)
Once direct election of Senators was established, States — and, therefore, the citizens — lost control of their Senators. Now Senators are fascists. They are beholden to the corporations that fund their campaigns. They pass laws to benefit those corporations to the detriment of the people they are supposed to represent. Unless you have deep pockets, it is almost impossible to gain an audience with a U.S. Senator. At best, all you can expect is lip service.
In Federalist No. 62, James Madison wrote, “The appointment of senators by the state legislatures… is recommended by the double advantage of favoring a select appointment, and of giving to the state governments such an agency in the formation of the federal government, as must secure the authority of the former… In this spirit it may be remarked, that the equal vote allowed to each State is at once a constitutional recognition of the portion of sovereignty remaining in the individual States, and an instrument for preserving that residuary sovereignty. So far the equality ought to be no less acceptable to the large than to the small States; since they are not less solicitous to guard, by every possible expedient, against an improper consolidation of the States into one simple republic.”
While a repeal of the 17th Amendment won’t completely abolish the fascist corporatocracy that currently rules to our detriment, it would go a long way toward improving the system. The 17th Amendment must be repealed.