Interesting which emotions those platitudes appeal to:
MAGA - Pride, achievement, responsibility
Hope and change - Please mommy take care of me
Platitudes work because they target basic emotions; these emotions motivate human action. Different platitudes mark different polices as different groups of voters hold...very...different motivators.
The hopenchange crowd still yells for minimum wage despite the higher unemployment that actually comes with the policy.
Supply and demand is something that takes responsibility to recognize and react to.