No, not necessarily. Liquid Singapore dollar cash always works in Singapore, including for obtaining housing. CPF accounts can often supply liquid cash, especially at age 55+. Bigger CPF accounts supply more cash. CPF accounts are not a burden.(*) They don’t require maintenance, cleaning, electric bills, or property taxes, as examples.
If you have a big enough pile of secure, well defended, reasonably liquid Singapore dollars you’re never going to be homeless or hungry in Singapore. If you have a landed property (and keep it) you could be hungry — the plaster walls don’t taste very good — and might even eventually be homeless when the roof collapses due to lack of upkeep.
(*) With the fairly rare exception of CPF members who are subject to some other tax jurisdiction and its impositions, but then the landed property would be, too.