So the police post will be effective in deterring any crime? If so there will be no crime in Singapore (since Singapore so small)!
Points to consider:
1) Majority of Singaporeans live in HDB flats, no problem with that. Still, private properties estates & enclaves with no HDB flats nearby tends to command much better prices and premiums compared to those near HDB estates.
2) Now, these are not just HDB flats, these are HDB rental flats! We don't know why these people are renting there, but we know most of them are in financial difficulties otherwise govt won't rent to them.
3) What is the probability of a person committing crime when they are in financial difficulties in Singapore (cum there is no social security net in Singapore) vs somebody who has the money and live in private properties?
4) Do you think a private property in a private properties enclave with no HDB flats in sight / nearby or a private property between rental HDB flats &/or even near workers' dormitories will give people much better sense of safety, security, high-class environment, premium for further capital appreciation, etc?