While I do agree most presidents were in it for the power and money, Trump is particular in that he really seems to enjoy cruelty much more than any US president we have ever seen. Yes the previous ones did surely allow and tolerate cruelty for power, I think Trump would simply want cruelty even if it did not materially benefit him. Because with other people, money and position makes them feel powerful. With Trump, money, position and cruelty makes him feel powerful.