I have dramatically increased giving post-MMM even as my SR steadily rose. I find it comes naturally... as my monthly savings went from a few hundred to $1k, $2k, and more, it became very easy to also allocate increasing amounts (both recurring and onetime gifts) to various nonprofits. I fronted my mom the cost of a plane ticket a few months ago to visit us, and after she told me about the work she's been doing, I asked her to donate the repayment to her organization instead of me. It didn't take even a second's thought. Back when I was grossing $120k and blowing 99% of the net, it would never have been an option.
And today's giving will be dwarfed by what I give away later, when I'm old enough to see just how far I've overshot my lifetime funding requirements. Not to mention the lifetime of volunteer work that will be made possible by not needing a paid job.