For such a crucial ally it does indeed seem silly to do so, the regulations are already flouted to such an extent it's worthless anyway; They have aircraft carriers (Granted they're the cut-down smaller versions, not a super-carrier) and a rather well funded military backed with U.S logistics.
They're also pumping out hardware at a rather impressive rate, although, to my eye it seems to be a means of supporting U.S forces rather than their own policy of serving self-interests.