Somehow it seems the anti tax people always stop at cutting taxes and never get to the cutting spending part. Looking at Reagan, Bush and now Trump they even increase spending substantially with the military.
The other side of that coin is that high tax people always want more spending.
So do the tax cutters as soon as they are in power.
In a democracy the electorate must be bribed with there own money. It is in practice nearly impossible to cut spending in any way that matters if you want to stay in office. I suspect there we are just stuck in an equilibrium in which this is what we spend.
If that's the case then you can't cut taxes. Simple arithmetic still applies if people like it or not.