Both presidentialism and parliamentarism are unequivocally democratic, but each of these regimes leads to different political consequences.
The great difference is that in parliamentarism the executive branch is composed of a president or a monarch, head of state, with limited powers, and a government appointed by Parliament, which at any time can censor. In presidentialism, however, the head of state and government coincide in the same person, are not subject to parliamentary censure and the Legislative Branch is limited to the area of law making.
Therefore, in presidentialism, voters elect the head of government (who in turn is head of state); instead, in parliamentarism, the head of government is appointed by the head of state, who is voted by the people.
Think about the idea here and you'll see how the idea of "cost" is inevitable in every decision. (It's true not just of governments, but of our own decisions too -- but we'll focus on governments here.)
Let's say the government decides it wants all citizens to have access to health care. Well, that's going to cost dollars to pay for that health care. Where will those dollars come from?
Let's say the government decides, in response to school shootings or other acts of gun violence, to ban certain types of guns or ammunition. That costs something to the gun dealers who were making money off those sales (and they'll object). Or let's say the government decides to do further and deeper background checks on all gun buyers. Well, that will cost something in terms of personnel and processes to accomplish all the background checks. Or let's say the government decides to increase mental health screenings and treatment because persons with mental illness issues may become violent and dangerous to society. That will cost much in order to organize and carry out better mental health intervention across the country.
I focused on just a couple issues there (health care, gun control). But the same principle holds on anything government does. You can think about your own examples that you'd want to use. Anything the government decides to do comes with some sort of costs attached. That doesn't mean it's bad to make such decisions -- it just means we need to count the cost and invest our efforts where they will have the best benefit.
hours before his speech to the nation on October 22, 1962, President Kennedy updates former President Dwight Eisenhower on the latest Cuba developments.
Kennedy had made sure that Eisenhower had been briefed regularly throughout the crisis, often by Director of Central Intelligence John McCone, who had been chairman of the Atomic Energy Commission in the Eisenhower administration.
As a leading figure in the Republican party, Eisenhower had criticized the Kennedy administration in sometimes harsh terms. In this call, Kennedy makes sure to get Eisenhower to say he would do the same thing under the circumstances.
It promotes a good image and will easily and peacefully resolve contact