Most Famously…and foresightedly:
In the councils of government, we must guard against the acquisition of unwarranted influence, whether sought or unsought, by the military-industrial complex. The potential for the disastrous rise of misplaced power exists and will persist.
With this as a postscript…from a man who would know:
What we need in a president is someone with these understandings. And a person who is willing to talk to the people honestly and directly about the decisions being made the trade offs necessary without diving into the cant (dialect) of economics, financiers, government (acronymophilia) or academia (grecoromanobibliophilia.)
The truth is that the president is both the most powerful person in the world and one of the most constrained chief executives in government. This is a good thing, a different combination would be very frightening.
Our president should have clear moral and ethical lynch pins, but that does not mean that he or she can or should try to enforce those views except as permitted and directed by congress and the courts. For example the president to represent the Ethics of the people of the United States needs to be anti-abortion (always) but know that in the end it has to be a choice made by the woman with her own conscience, that is the meaning of individualism in politics/society.
Much about taxation and regulation is beyond the direct control of the president but the executive does control implementation. The number of laws is so huge that there is no way to actually enforce them all. [A problem congress needs to fix by timing out old laws and replacing them with simpler laws updated every decade or so.] A president needs to follow the letter of the law but always push for the most minimal use of resources to enforce them, sometimes (a lot of the time) to the point of ignoring them except as modifiers (adders) if someone is indited for other reasons. The biggest job an executive has is to ensure that the ‘system’ is not captured by those it is supposed to regulate…or if it is (by law) to ensure that they are self regulating to the advantage of the citizens in general, not their own enrichment or more dangerously their enshrinement. Far too many of our laws at all levels of government, intended (perhaps) to protect the poor defenseless citizen, are in action a way for a small group to ensure that their way of life (money siphon) is affected (throttled or knocked from their lips), for example: medical, bar, plumbing, electrician, cosmetician, licensing laws in each state.