This is a good observation. There are many people abusing the system. There are people who are rich, e.g. earning $700k pa, but they still insist on staying in a HDB flat and enjoying the utilities rebates meant for the lower income. There are people who still own a HDB flat (and they rent it out) while the enjoy staying in a luxury condo. This is a big loophole in the current housing policy.

People who own private property today cannot buy a HDB flat unless they sell away their HDB flat within 6 months, whereas those who currently own a HDB flat can keep their flat and rent it out while they buy a condo and stay in the condo. HDB flats are for the lower income groups in society and should not be abused and hoarded by the rich and higher income groups. This housing loophole need to be corrected. There are people with multiple private properties and are multi millionaires but they still keep their HDB flat. Shame on them.