Earlier quoted context omitted.
I think this is a really important concern. Btw, 5% is still quite a bit more than the average, so good work! We're attempting to overcome this worry through community and behavioural economics hacks. E.g. I take every opportunity that I can (like this one) to say publicly that I'm planning to give away the majority of what I earn, which makes it a helluva lot harder for me to back out. Similarly for Matt - it would…
Not only is 5% of one's income a rather high number, even the average amount that people give in the United States is far higher than the corresponding amount in other countries (ex: Japan). It may be the country's Christian leanings that contribute to this, but to be charitable is seen as a virtue and absolute good in this society. This is not necessarily the case in other societies.
I also can't help noticing that some people who extol the virtues of religious giving are strenuously opposed to any expansion of government services, and seem to consider the whole idea of government taxation an intolerable confiscation of their money and thus an infringement upon their liberty. Such folk don't buy into the notion of a secular social contract between the state and the citizenry, and I often wonder if it because they see the state as being in competition with the religious establishment.