I believe the answer is: wording effects
Wording effects refers to the ability of presenting a certain thing in different word may outcome the perception that people have toward that thing. In the example above, the phrase 'aid to the needy' might be falsely perceived as the program to give things to the people who are 'constantly demanding',
I believe the answer is discrimination.
The method of unfair treatments could take range through wage discrimination, discrimination on legal treatment, discrimination on prejudice, etc.
If left unhandled, discrimination will keep a disadvantaged social group deeper and deeper into social and economic slump.
A pyramid of energy represents how much energy, initially from the sun, is retained or stored in the form of new biomass at each trophic level in an ecosystem. Typically, about 10% of the energy is transferred from one trophic level to the next, thus preventing a large number of trophic levels.
