Definition of "unconcealed"

Dr. Beeching's obvious intent is that if Scottish—and similarly unprofitable English and Welsh—railways are to be maintained, it must be done by an unconcealed subsidy; he is determined that the railways shall no longer be preoccupied with—and derided for—immense deficits which include the burden of social services the State must openly underwrite, if it wants them.

1962 October, “Talking of Trains: Passed to you, Mr. Macmillan”, in Modern Railways, page 220