As someone who owns a business and has to make quarterly tax payments, paying taxes is painful. I know how much it costs me every time I write a check and I am very reticent to vote for any politician that thinks we should raise those taxes.
On the flip side, I have many friends whose taxes are just pulled out every paycheck. And at the end of the year, they get a tax refund. They act like the government is giving them money! Many don't even seem to realize that all they are getting is a repayment for an interest free loan they have been giving to one of the largest and wealthiest organization/government in the world.
I understand and agree that taxes are important, but if we make it too easy, we make people complacent and the next thing you know, we will wake up with a 75% tax rate.
This is the same reason I disagree with adding the tax in on product prices. People in other countries that do this don't realize how much of the price is going towards taxes - and to keep a government in check, information is key.