Really, not a word of spending cuts is in his plan and as such future increases in the debt ceiling are guaranteed. If he wanted to cut spending he needed to say so and exactly where as the way his proposal reads it's nothing but magic whereby everyone gets to keep more of their money with no repercussions which isn't possible...
Why would he discuss spending cuts when discussing his tax code plan?
Because telling everyone they're getting tax cuts only to then tell them they have to pay more for x, y, and z because of spending cuts is just more crooked logic on the part of Trump, much like his border wall saving millions while costing billions... If he said not only am I going to cut taxes, but I'm also going to cut spending as we're wasting money I'd have nothing but respect for the guy finally being honest, but instead he continues to just say what low information voters want to hear...
