How far can the govt go to make things compulsory and make the people pay?

We are familiar with CPF Life and the going to be introduced Medishield
Life. Both are compulsory schemes and the people have no choice, cannot
opt out but to pay at whatever rate the govt thinks appropriate and
right to charge the people. Many have forgotten the Home Protection
Insurance Scheme which is also a compulsory buy for any new HDB flat
owners.
 
The people are accepting these