When we minister to the least of individuals, we are ministering unto the Lord  -  Matthew 25:40

And the King shall answer and say unto them, Verily I say unto you, Inasmuch as ye have done it unto one of the least of these my brethren, ye have done it unto me.

When we minister to others, no matter what their status, finances, or place in society, we are ministering to Christ.