You need to pay because the money will be sent to the govt & the govt will use the money to pay other jobs i.e. garbage man, snow clearing etc.
If you don't pay taxes you will be confronted by the govt & will go to jail as a consequence.
Although, if you have an issue for not paying the taxes; unemployed then the govt will assist you.
The type of taxes that you have to pay is for groceries, federal tax given to the federal govt, & payroll tax; paying a min wage salary from pay-check.
Hope this helps :)