I never like the use of the word "mass market" condo. I think it's better to classify by location, i.e. city, suburban or city fringe. The term mass market is misleading and gives people the impression it gives inferior facilities or less space etc but in reality, at least in Singapore, most mass market condo provides better facilities, exclusivity and landscape than those high density condos in the city with only a lap pool. In short, a suburb can be "luxurious". Similarly, a city condo can be very "mass market". It's like in the US where there are wealthy suburbs where the likes of Angelina Jolie and Brad Pitt stays.
And in Singapore, most of the high-end condos are targeting foreigners - not the towkays you mention below. Towkays usually stay in landed property