The purpose behind writing magna carta was to

show the noblemen how to write a contract

create a new legal concept

ensure that the king did not act above the law

protect all englishmen from the king’s power

provide a basis for common law in england

Ensure that the king did not act above the law.

At that time, the king has too much power. The Magna Carta put thr king under the law to reduce that power.

the difference is that white collar worker performs skills like worker as a scientist or well blue collars do physical work and they do services like being a cook.