Two different outcomes from two different sources.

Lowering income tax doesn't cost the employer anything extra. It puts no additional burden on them that could force them to change their hiring practices, layoff workers, or be forced to increase prices to avoid potential bankruptcy. When wages go up it drags everything up with it because the money has to be made back at the expense of the people. When taxes go down the burden doesn't increase on the employers so there's no risk of people being forced out of business or forced to sell / layoff.

We want people to have more money but there are ways to do it