it feels 'off' to me because
- he is in a management position so there is a risk that those who report to him could feel pressurized
- this is for his mission so there is an element of personal gain, it is not something which he is doing for an external charity
- it is for an explicitly religious purpose
In our workplace, we don't have a 'no fundraising' rule but we do have a 'no pressure' rule - in practice, this means that someone who is fundraising will send one e-mail round, letting the office know what they are doing, and either attach a link (if sponsorship is on-line) or leave the sponsorship form in the kitchen. Following up, asking people individually, either in person or on line, or otherwise pressuring someone to donate are not allowed.
We don't have a formal, explicit rule against senior members of staff fundraising but in 13 years I cannot think of a single time when any one of us has done so, as it would potentially make people feel uncomfortable saying 'no'.
Collections for leaving gifts etc are done anonymously, in that an envelope is sent round - everyone puts in whatever the wan by way of a contribution for the gift and initials the envelope to say they have seen it. There is no record of who gives what, and as initialling the envelope says "I've seen it, don;t give it me again" you can simply initial it and pass it along to the next person if you don't want to give. Gifts are always given either as "from all at [company]" or (if the partners have given a separate gift) "From all [company] staff"