I think this whole idea of political/professional loyalty pushed by Trump is repulsive.
In a political/professional capacity, you are supposed to recommend/support the best person for the job whether you like them or not, and regardless of what favors they may have done for you in the past. Because when acting in a professional capacity, you're not really acting as an individual but rather as a trustee for the political office for which you were elected, or for the job you are holding as part of your employment.
The idea that "I did you a political favor so you now owe me in return" is the exact kind of crap "the swamp" uses to maintain power. The problem is that people in positions of trust and politicians too often don't do what's right. Instead, they do what is good for themselves or for their political allies as part of the "I scratched your back so you scratch mine" swamp mentality. The moral imperative if you are acting in a professional capacity is "best person for the job", not "best buddy for the job." The fact that Trump thinks otherwise, and gets outraged when people don't treat their positions of trust as personal coin, is just sickening. People elected Trump to office to do what is best for the country as a whole, not to use his position to accumulate "favors" for which other people must "repay" him later. Just another indication of how unfit he is for that office.
That's a different situation from loyalty in terms of personal relationships/friendships outside of work, where "favors" you do for others are in your personal capacity and not when you are acting as a representative of a larger organization. Loyalty in that situation is entirely different.
