I feel the way you do. Certainly the conglomeration of the intelligence agencies at the end of WWII made it possible for grander events. However, the forming of the IRS and personal income tax by Woodrow Wilson, as well as shipping arms illegally to Britain in WWI suggest it was afoot much earlier.
I think there were always traitors, maybe some of the rich King George loyalists’ descendants. Some went to Canada and some went to Britain but many remained here but may have been secretly loyal to Britain. And Britain did not want to let go of their colony. They even returned in 1812 to wage war on us even burning down Washington and the White House.
I have been thinking how there are always traitors. Even Jesus had Judas the traitor among his twelve Apostles.