The problem with that line of thinking is that the persistent/bullying fundraiser will then keep asking you/others who take this approach as they got a positive result the previous time(your $20).
Appeasement never works in the long term with persistent askers/bullies…it telegraphs weakness to them and gives them greater incentive to ask again…and to ask for more…
I also have serious issues with fundraisers who are so entitled and presumptuous as to assume it’s ok to assign someone a dollar amount.
Or worse, if the activity/event is politically/religiously affiliated…especially for proselytizing purposes and the fundraising individual is presumptuous to ask someone who they haven’t confirmed is a member of their religion/denomination/church/political party.
I’ve been fortunate in that nearly every workplace I’ve worked in bans these sorts of coerced solicitations* and actually enforces them by firing those who persist in the manner of OP’s fundraising soliciter.
- One should be free to decline for any reason without any repercussions from others...especially the employer.