I don't think having that discretionary income is anything but a plus. It certainly isn't making me any poorer.
We abide by the same principles. I always tip well at restaurants and give to any service person who has to touch me (i.e. massage therapist, lady who does my mani-pedi). Having discretionary income is definitely a plus, but I’m not wont for much in this world; so giving to those who might need a hand up is a no-brainer.