So, Employment notwithstanding, It would seem that this could be used to stay here for long periods as it's geared to those with high net worth, and it's multiple entry and good for 5 year intervals just like having PR. So it shouldn't be a problem for some who would like to retire here as you could conceivably retire at 45 (not this guy though! :9 )Eligibility
Social visitors are eligible to apply for a renewable Visit Pass for long term stay of up to 5 years if they meet the following criteria:
1. 45 years old and above;
2. own a property / properties in Singapore worth at least S$500,000 (in total) for residential purposes and meet any one of the following financial requirements:
* have savings of at least S$400,000 parked in Singapore in any form of financial instruments based in Singapore, or
* show evidence of a monthly local income of at least S$7,000, or
* have a combined, savings and 5-year equivalent income of at least $400,000.
3. must be in good health.
4. have valid medical insurance in Singapore.
For renewal of the Visit Pass for purpose of long term stay, the applicant is required to meet the same set of investment, financial and medical requirements as indicated in paragraph (1) to (4) above.
Here's the link at ICA:
http://www.ica.gov.sg/page.aspx?pageid=238&secid=171