Some tax cuts can be welfare, and by that I mean an unearned and undeserved gift.
For example, while it was a good idea to subsidize agriculture originally, that was small farms and was intent on reducing food prices.
But agri-biz has taken advantage of agriculture subsidies and turned agriculture into more of a monopoly that does not pay its fair share.
The employer health care benefits for employees was taken over and abused by insurance companies.
The 15% capital gains tax rate is also such welfare, in that allows the wealthy to just get paid in stock options and pay less tax then the poor.