We live in a democracy and the majority says we must. Having lots of people on one side of an issue does not turn a wrong into a right. When we were young, we also learned that it was wrong to take other children's toys without their permission. It didn't matter how many children wanted the other child's toys. You use government services so you should pay for them.
Honest people pay their debts and fulfill their promises.
And nothing is free. Imagine the reaction at your local grocery store if your food bill was based on your income or the value of your house instead of the food you selected. Divorcing the cost of the service from your obligation to pay would make you act the same way that rational taxpayers are being led to act in Canada today. We demand Cadillac services and get angry when our politicians can't deliver them on a Hyundai budget. The politicians that succeed in this atmosphere of general dishonesty are rarely the most truthful.