Well, you said “effectively”, so in a way you are saying that Trump “might” do that.
Id love that, but honestly it is ultimately the purview of Congress, and in any case, it should be done in a gradual fashion. It can’t simply be turned off. That would be destabilizing. The costs likewise would have to be progressively turned off. All this includes the fact of whether something is fair to those who’ve been affected by these things. SS, e,g., should be stopped but need to be gradual including that those who paid in all their lives need to get their money back.
I used the word "effectively", because income taxes was hinted out, in the past 2 weeks (to GOP lawmakers on using Tariff's to abolish income taxes). Separately, he referred to taxes on tips going away, however I'll note that if one removes income taxes, that would include tips. IMHO, the tips things was said to grab a news cycle or two to project the whole process of moving towards a national sales tax replacement.
As for the difficulty of doing all this with CON-gress, hold DJT's beer: The fiat dollar is being replaced with asset-backed, right before our very eyes in realtime. All these changes and more go with this... like, inheritance taxes going away too.