the selfish are the majority
If a condo corporation has a majority of owners who are short-term investors, retirees on low fixed incomes and low-income earners who put everything they had into the down payment on their units, then the short-term selfish owners—that a healthy society requires to remain a minority—joins forces and becomes a militant majority.
Education is the answer
Education is not the answer. Trying to inform the "selfish" majority that in the long run it is best for them to start paying higher fees now, when they are facing monthly bills that are getting harder and harder to pay, is an impossible task. They will reply that in the long run, we are all dead.
Best in the long term
Enlightened self-interest also has implications for long-term benefits as opposed to short-term benefits.