Every admin since Reagan promoted a combination of neoconservatism and neoliberalism, leading to military intervention and dirty tricks in other countries (and leading to large numbers of civilians dead) and deregulation to favor the rich, from tax breaks to bailouts.
The actions involved not just the President but several cabinet officials, heads of agencies, legislators, etc. Several of them worked across several admins.
Behind all that is a Wall Street that needs the petrodollar propped up through perpetual warfare, which controls the Fed (essentially, a private consortium of commercial banks), and funds much of the economy and the defense industry (which, as early as the 1950s, Eisenhower argued is part of a military industrial complex).
Anyone who thinks that what's been happening involves only one person is incredibly naive.