Disagree.
How the funds are used isn't the issue. The fact remains that an income tax is immoral, destructive, and unnecessary, and should be abolished.
how would you pay teachers,doctors,road workers, train workers etc.?
It's 2014. People should get this by now.
School and teachers are paid for by local property taxes. Ditto for police.
Medical care is a life expense. You pay it like any other bill. If it's too expensive, cut regulation and get the government out. Catastrophic insurance is a great concept to address this too.
Roads and such are paid for by gas taxes.
Practically every service a citizen expects from government is paid for via other means. Income tax goes to pay the interest on the national debt, meaning the private banks that own the Federal Reserve get your sweat and blood.
Of course, this primarily applies to the USA, but also to some degree to some other countries.
I'll say it again: income tax is unnecessary. Even if you thought everything a government wastes money on is actually necessary, it can be paid for by far less intrusive, less destructive means than taking a super-tithe of people's personal incomes.