The Indian Constitution meticulously lays down provisions to ensure the independence of the judiciary, recognizing it as a cornerstone of a democratic and just society. A free and impartial judiciary is essential to uphold the rule of law, protect fundamental rights, and act as a check on the executive and legislative branches. The mechanisms ensuring judicial independence include:

1. Security of Tenure: Judges of the Supreme Court and High Courts are provided with security of tenure. They can only be removed from office by an order of the President on grounds of proved misbehavior or incapacity, following a rigorous impeachment process requiring a special majority in both Houses of Parliament. This protects them from political pressure.
2. Fixed Service Conditions: The salaries, allowances, privileges, leave, and pension of judges are determined by Parliament but cannot be altered to their disadvantage after their appointment. This ensures financial security and prevents the executive from influencing judges through financial means.
3. Expenses Charged on Consolidated Fund: The salaries and allowances of judges, along with the administrative expenses of the Supreme Court and High Courts, are charged on the Consolidated Fund of India/State, respectively. This means they are not subject to the vote of Parliament/State Legislature, further insulating the judiciary from legislative interference.
4. Prohibition on Discussion of Conduct: The Constitution prohibits any discussion in Parliament or a state legislature with respect to the conduct of any judge of the Supreme Court or a High Court in the discharge of his duties, except when an impeachment motion is under consideration. This protects judges from unwarranted criticism and political attacks.
5. Ban on Practice after Retirement: Judges of the Supreme Court are prohibited from practicing in any court or before any authority in India after their retirement. High Court judges are restricted from practicing in any court in India except the Supreme Court and other High Courts. This prevents potential conflicts of interest and ensures impartiality during their tenure.
6. Power to Punish for Contempt: The Supreme Court and High Courts have the power to punish any person for their contempt. This power helps maintain the dignity and authority of the judiciary and prevents attempts to undermine its decisions or processes.
7. Separation from Executive: The Constitution mandates the separation of the judiciary from the executive (Article 50). While the President appoints judges, the process involves consultation with the Chief Justice of India and other judges (through the collegium system), limiting executive discretion.

Importance of the Basic Structure Doctrine:

The Basic Structure Doctrine, propounded by the Supreme Court in the landmark Kesavananda Bharati case (1973), is a crucial bulwark for judicial independence and constitutional supremacy. It states that while Parliament has the power to amend the Constitution (under Article 368), it cannot alter or destroy its 'basic structure' or essential features. The importance of this doctrine is profound:

1. Checks Parliamentary Power: It acts as a fundamental check on the amending power of Parliament, preventing it from using its majority to dismantle the core tenets of the Constitution and establish an authoritarian regime.
2. Protects Core Values: It safeguards fundamental principles like democracy, secularism, federalism, judicial review, rule of law, separation of powers, and fundamental rights, which are considered integral to the Indian constitutional framework.
3. Ensures Constitutional Supremacy: By limiting Parliament's amending power, the doctrine reaffirms the Constitution as the supreme law of the land, above the legislative will of any temporary majority.
4. Strengthens Judicial Review: It empowers the judiciary to review constitutional amendments and strike down those that violate the basic structure, thereby solidifying the judiciary's role as the ultimate interpreter and guardian of the Constitution.
5. Provides Stability and Continuity: The doctrine provides stability to the constitutional framework by ensuring that the fundamental identity and spirit of the Constitution remain intact, even as it adapts to changing times through amendments.

In essence, the independence of the judiciary, buttressed by the basic structure doctrine, ensures that the Constitution remains a living document that protects individual liberties, maintains democratic governance, and upholds justice against any form of encroachment.