Agree 101%- no difference from your class, year, faculty, university alumni gathering,for the "successful " (means rich in red dot) to show off and the institution to raise funds.
The "poor" will not want to be contacted and after a while disappear from the mailing list.
Actually the poor will have their own gathering in some HDB coffeshops lamenting at what could/should have been when the hard truth is that they voted for the wrong people and have to starve from 55 to 65 before they can touch their CPF min sum/life.