The purpose of proportional representation is to ensure that the losing party, i.e. the party that has no candidate winning an election or the party has a significant proportion of the vote count but did not win sufficient seats, will get some representation in Parliament. The system may require the party to get sufficient percentage of votes, e.g. 5% before they are allowed representation. If a party has 10 candidates winning out of a total of 100 seats but has only managed to garner less than 10% of the total vote count, e.g. they happened to get slim majorities in sparsely populated areas, the party will have all 10 candidates in Parliament. It just means they are not allowed to put in Parliament any more people from their party list who did not get voted in. This is very unlikely to happen in tiny Sinkieland if the electoral boundaries are drawn up properly.
You are just here to confuse the issues, aren't you? In any case, there are a few varieties of proportional representation.
http://en.wikipedia.org/wiki/Proportional_representation
Yes, many types of Proportional Representation. I don't understand how some models of PR work too.
Germany, New Zealand and Netherlands voting systems are too complicated and unsuitable for use in our small country.
The best election system which included PR is the parallel voting / Supplementary Member system.
each voters has 2 votes - one for constituency ( first past the post ) and one for favored political parties ( party list PR ) The proportional of constituency seats to party list seats ranges widely according to needs.
This way, everybody get to vote, your constituency is a walkover, you still have the party vote. PAP can even keep their GRC if they like, the main criticism of GRC is walkover, peoples don't get to vote, since peoples can vote now, GRC can remain.
Supplementary Member system is a very simple election method, much better than the thai model to prevent walkover which doesn't solve the real problem.