People who came up with report have no power to do anything about it.
"Power" is a slippery concept sometimes...a better word might be "influence".
The DSC has been banging on about budget versus capability for quite a while and one suspects it won't be too far in the future before a big military player responds in a negative manner to some sort request for military intervention. presumably followed by a very public resignation.
Before we get to that, we might be looking at a major policy change...such as binning all expeditionary capabilities and their associated foreign policies. Which would a fairly seismic event. Come to think of it, the last person who wanted to go down that road was Neil Kinnock.
So I think if the DSC keep throwing a bright spotlight over the issue of under-funding, somethings going to have to give and that might cost a defence secretary, or who knows, even a prime minister, their job. So I think it unlikely these reports will be quietly ignored.
In truth though, and as the report points out very clearly, Joe Public really does not have a scoobies what is going on...and that is the biggest threat of all.