The following is purely theoretical for now but assuming I eventually have surplus income, I would be very interested in your comments and/or advice. Is it better to

• invest in a scheme whose stated ethical policy matches many of my stances and pays 3% interest
• invest the same sum in a scheme which may well make its profits from sources I detest but which pays 4.5% interest, then give the extra interest to causes I definitely support
• forget about investing and give the original sum to causes I definitely support?