No I don't remember specifically saying anything about the income tax system being a disincentive towards people working. I believe I mentioned that it takes money away from being used in the economy to better effect than the government can use it for. I also note that we do need a tax system of some sort as we do have to provide for infrastructure. Any debate as to what is legitimate infrastructure and such is the subject of another thread. I know I have mentioned that I believe that the Fair Tax bill is the better tax system than a progressive tax system.
As to our social net systems, I have never said that people turn down good jobs to stay on these programs, but when getting an entry level job can cost you your welfare or SNAP benifits, leaving you at less overall income than remaining unemployed, then the system is broken. My sister is on disability. She's working hard on getting a Masters so that she can get off and get a job that pays enough to be over what she gets for disability. But she has to watch what income she gets because if she gets so much then they take away the disability and she will actually be at less than the disability itself. I don't disagree with the intended purpose of the programs in and of themselves, although I do contend that private charities could do the job more efficiently and better weed out those who just want to skate on other people's dime. I object to the way that the programs are run that end up leaving people trapped in these programs for multiple generations.