The content of that article simply expounded of the much more expansive discussion the Airforce Secretary had on his recent visit and talk at CSIS.
He says there aren't enough programs. He is wrong. The problem is most of the programs the US portrayed as "game changers" from the Cheney and Rumsfeld era where they were supposed to make a leapfrog in technology either turned out to be vapor like Future Combat Systems, where they spent $32 billion to get little in return, or abject failures like LCS or DD(X). The result is the US pretty much wasted the last 20 years developing weapon systems which were unfit for purpose. There are some notable exceptions like the Virginia submarine, or the F-35, even despite the warts, where the systems did enter serial production. But even in those cases there are issues, like the scandal with submarine steel on the Virginia which mean it cannot operate at the depth it was supposed to, or the many flaws of the F-35 which have led to low availability rates.
Then you have the F-22, an aircraft which at this rate might last less in service than the F-15 it was supposed to replace. They bought too few of them, did not upgrade them, and the bays are too small for a lot of payloads.
Now they proclaim they will solve these issues with yet another development program. Which will take a long time to get through and might also fail. The emphasis on highly complex "must have" technology like Adaptive Cycle Engines for the 6th gen, for example, could cause the US 6th gen fighter programs to fail. They could have developed a replacement for the F-22 with technology developed for the F-35. But they failed to do this.