some will pay more and some will pay less
some will save a lot more and some will pay a lot more
just because your withholding was less doesn't mean you save any money or got much benefit
simple thing to do is compare the total tax liability from 2017 to 2018 return
you can also use this calculator or many similar ones found online
https://www.hrblock.com/tax-calculator/#/en/te/aboutYouMuch more importantly, Republicans said this tax give away was actually going to produce more tax revenue because it was going to magically create jobs (i.e. companies would take there tax savings and decide to take that windfall and create new jobs.) Of course that is total bullshit because you don't create jobs because you have more money. You create more jobs because there is more demand for your product or service).