It isn't really possible to link taxation to spending in this way, because there are things that cost a lot of money (say, healthcare for poor folks) which are

It isn't really possible to link taxation to spending in this way, because there are things that cost a lot of money (say, healthcare for poor folks) which are in the public interest but no direct tax to pay for them; meanwhile there are things that raise lots of revenue (say, payroll taxes) which have no corresponding outlay.