It is even worse if there is an ethnic difference in the mix (e.g. the Flemish vs. the Walloons in Belgium).
Also, I wonder whether New York / California liberals would really welcome soldiers among them and whether the military could recruit enough people there. Amazon got kicked out from New York for being too capitalist.
It definitely seems to me that the coastal elite wants a strong military to protect their trade empire, but preferrably located far away and with someone else's kids doing the dangerous parts of the job.