If grassroots organisations are part of the incumbent party,
then it means that PRs can join political parties in sg?
It opens up a lot of questions. 
You see, my dear, Singapore is cultured in way of networking and
carrying bosses, working hard and education is another issue, if
you know how to network with the right peoples and do the
necessary carrying, you get what you want faster.
It is an open question, no doubt about that, PRs and work
permit holders are learning our culture and trade of
networking well, instead of depending on their employers to
recommend them Citizens or PRs status, which may not surface, they
join RC, get the chance to meet the MPs week in, week out, and when
the MPs make recommendation, they stand more chances to attain
Citizenship or from work permit to PR status.
Just quote an example, my nearby kopi tiam selling chai png and
Zi Char, the lady boss was like a aunty to me, she is a active RC
member, a group leader too, I asked her why is it that she is
busy and yet still want to join RC, she point to the extended
her chairs and tables out in corridors and road and said that if
she dun join RC, she will not be able to extend those tables out
there to do more business. Get it?