Public television periodically runs pledge drives to raise money. Only a small percentage of the people who benefit from public television are willing to pay. This low percentage of people willing to contribute illustrates a difficulty with:.

Answer

voluntary programs

Explanation:

voluntary programs   or activities that are usually individual or people voluntarily participate in and they are not paid for it. sometimes, voluntary programs are made for profit and sometimes  not for  profit.

pledge drive is a vivid example of a voluntary program. sometimes, only some few public television are able to get donations to run their day to day program/activities. most times, the subscription will be an addition to others and also large source of revenue. most times the incentives to join and dangers of shirking is a problem affecting voluntary program

looks

the answer would be voluntary exchange -

"the act of buyers and sellers freely and willingly engaging in market transactions. moreover, transactions are made in such a way that both the buyer and the seller are better off after the exchange than before it occurred."

hope this : )

-shy