Hasn't this topic been done to death in the forum?
First thing that comes to mind is the objective of one's vote:
For example, are we voting on an
institutional or individualistic level, for the "greater good" or to further
self interests?
We weigh the risks and rewards before casting a vote -
you can't expect Voter A's strategic
call to be aligned with Voter B's.

Always bear in mind that there are a substantial number of
people out there who are doing well. You can call them
ball-less, stupid, boot licker, sheep, all you want till you are
satisfied. It will not stop them from voting the PAP and send their
maids to queue for their condo purchase.
They don't like the PAP, but they want more good years.