I thought personal relief was reduced to $1000 quite a 2-3 years
back? You also forgot to mentioned that they combined CPF and
insurance into a single component; if you contribute more than $5k
CPF a year, you are no longer eligible for insurance premium
deductions to offset your tax. This also happened a 2-3 years
back.
In addition, they also change the income calculation brackets
etc.
Capping CPF at $4500 meant more than just more tax;
1) reduce pay as employers pay less CPF to you
2) less money to go towards mortgages, more cash payment
However, it does means that you have more flexibility to use the
additional cash that would have been locked away in CPF.
On the surface, it looks good to be getting more cash but one has
to bear in mind that they need to be discipline to set this (and
other) amount aside for retirement.