I dont think highlighting insensitive and low level professionals attending wedding dinner in this instance is wrong. At least with this message there will be more awareness so that the younger generation who attends dinner in future will not cause embarrassment to themselves.
By inviting friends and relatives to an exclusive place like MBS , we cant assume it's all show-off , the rich will prefer to have a grand dinner to remember this special occasion but surely they will not complain if their poorer relatives send them $30 or $50 ang pow. It depends on who is coming along and his status , but if I invite rich relatives , especially it is stated SC and Senior Manager SIA wife , I would expect them to have the decency to dish out an ang pow that will not put them to shame. They need not put in $500 but at least $200 to $300 for 3 paxs makes sense.
To put in $100 simply tells everybody ,they are out to take advantage , they cant be so misinformed since both are elite class. But it is quite common that such characters exist around us , strangly enough they are usually from a good family background and not those who are poor. The poor are moe generous and thoughtful too, hope this message will reach this family so that they will change their ways. Money is not everything in life, my pastor used to tell us , after death we can either go Heaven or Hell but all our assets still in bank and cannot be brought along .