Actually the Post didn't tell readers this, it instead told them that the tax cut would, "add an additional $3.2 trillion to the federal deficit over a decade," according to a projection from the Tax Policy Center. Since next to no one reading the Post has any idea of how much money $3.2 trillion between 2028 and 2037 is, it might have been useful to put this number in some context. As it is, the paper just told them that the cost of the tax cut would be really big.