It is vey easy to increase electricity and water tariff when your are a monopoly.
These people only know how to increase price. They have conveniently forgotten how to decrease cost. It is quite certain that fat cats in the board are drawing fat cheques and the tax paying public are being punished for mistakes made by the fat cats.
Same for NTUC taxis and public housing and public transport.
As I said before, natural monopolies, such as public housing, utilities must be treated with special delicacy. In this, while you want the efficiency of a corporation in these kind of "markets", you also have to be careful about equity. Therefore you need to balance between service and efficiency and ensure you deserve an equal dose of both.
That's why if the conduct is more benefiting of what is a natural monopoly and that some free market principles do not apply in these monopolies, then I believe general citizens would reap the benefits.
Similarly in industries where its possible to have a free market, ran by free market advocates in line with free market principles, then with government as the overall regulator to reduce abuse, the free market actually lowers costs and improves market competitiveness at the same time.
So believe me, I think this rise is unjustifable because in some industries, such as this, free market principles cannot be applied wholesale. Its wrong after all.