The CPF table showed that when you get older, your contribution get lesser? So why the complaint? Initially, they were against CPF and now they want more as people could see the benefit they reap from have the policy. Have they not forgotten or are some of them are too young to know the history?
My point was, CPF is just a tax by any other name, except that it doesn't even re-distribute income to reduce the income gap. Here's a very simple example with 10% to 40% tax:
Person A - $10000 salary, $4000 tax (40%) = $6000 after tax
Person B - $1000 salary, $250 tax (25%) = $750 after tax
Person C - $500 salary, $50 tax (10%) = $450 after tax
Total tax collected: $4300.
Amount left for benefits after costs and other uses etc: $1000 (assumption only)
With a normal progressive tax / benefit system, the poor get taxed less, and the rich get less benefits. With some arbitary numbers for illustration purposes:
Person A - $6000 + 10% of benefits = $6100
Person B - $750 + 40% of benefits = $1150
Person C - $450 + 50% of benefits = $950
That we have very little in the way of benefits is a point that I think no one will argue.
With CPF and lower taxes that only A has to pay however, A's salary may be lowered, but by less. B and C aren't much better off.
Person A - $10000 salary = $8000 after 20% tax
Person B - $1000 salary = $1000 = $1050 after random ad hoc bonuses
Person C - $500 salary = $500 = $650 after random ad hoc bonuses
Now for the arguable points:
1) CPF is supposed to be used in place of the benefits
2) The reason why CPF contribution for low wage workers is lower because they don't have enough take-home salary every month to live on if a full 20% deduction is made
If they have barely enough to live on every month, do you think they will be able to save? With lower CPF contributions, and next to nothing for benefits, who are they going to turn to when they are in need? What are they going to use for a pension when they're old? Minimum wage may be a possible answer. Throwing away their future is not.