As a consequence of this parliamentary evolution, the sovereign's right to the throne became more concrete, seeing the opposition scrutinise government legislation and policies, rather than engage in disputes between competing candidates for the Crown, each supported by different religious and economic groups. Further, the acceptance of such a thing as a loyal opposition in Parliament factored into the development of a rigid party system in the United Kingdom; the separation of Members of Parliament's loyalty to the Crown from their opposition to the sovereign's ministers eliminated the idea that there could only be one "King's Party" and that to oppose it would be disloyal or even treasonous.