Government holds the reins of authority.
Monarchy holds the power to reign.
In today’s society, Monarchy has the power to reign but no authority, whereas Government has the authority to rein and rule, but no power.
To ‘rein in’ is to control and direct another, whereas to rule is to ‘rein in’ all others.
Free rein means that we are free to determine our own choice and be our own authority.
To ‘reign over’ is the power of the Monarch, which today has no authority to rule.
Without both power and authority the ability to be a supreme ruler is denied. Government needs the power of the Monarchy as much as the Monarchy needs the authority of Government.
An Autocracy has one supreme ruler.
A Democracy has a clear distinction between those who rein and those who reign.