First post on an interesting and much-discussed topic. My long-term gal works for a company, and lives with me in BKK (she's from udon originally tho). I usually supplement her to the tune of 15k per month, and leave her to manage "family issues". Why? Because although I know she can survive on her salary, and many do, she's shown herself good at managing the money and I want her to have an improved lifestyle without asking me everytime she needs the cash to do it. And also, because of my generally short fuse for family interactions (with hers AND mine), and strong belief we are a mixed culture relationship so special concessions on both sides are necessary, I prefer she take care of the family issues rather than me directly. It's my failing, but I'm just not an extended-family type of guy.
If she decided to quit her job on the basis she has the means to live a life of ease, I'd rethink the whole strategy

Plus of course I pay all the bills - rent etc. That's where it gets interesting tho - I know one guy who says he gives "only 10k", but then I see him buying cars, a house for the family etc etc, and when you amortize that over the year it adds up to a whole lot more. Some dupes basically hand over their whole pay packet, but out out of shame or embarrassment or whatever, try to put up a "manly" front to their buddies of how little they give as if it is some measure of how much they are loved. To be honest if a guy wants to hand over everything, that's his business not mine, but what I find amusing is all the cover stories almost as if he is trying to fool himself (which he probably is).