Subtle point, he says that “Increasing general taxation is not the solution to all of our social problems and infrastructural deficits and increasing it too much creates a problem in itself.”
This seems to leave open the possibility of compulsory pensions, compulsory community medical insurance, a levy on this, a charge on that ... all of which will still make a fair dent in worker's pockets and imo could create "a problem in itself."
It's easy to be in favour of low taxes, the hard part is the other side of the equation - limitations on government spending, on how to curb its insatiable appetite for the money of citizens.