serial- sequence priveleges

[salah jubeh <s_jubeh@xxxxxxxxx>]

Hello,

When creating a serial, a sequence is created automatically.

CREATE TABLE tablename (
    colname SERIAL
);

CREATE SEQUENCE tablename_colname_seq;
CREATE TABLE tablename (
    colname integer NOT NULL DEFAULT nextval('tablename_colname_seq')
);
ALTER SEQUENCE tablename_colname_seq OWNED BY tablename.colname;

Should not  a proper permissions based on the table privileges added to the sequence ?. For example, when a table has INSERT, UPDATE permissions on the table  to a certain user, this should be taken into account. 

Regards