Labour contract esi and pf contribution

Nandeesh A. B. (Executive Accounts,) (59 Points)

19 January 2016  
Dear Sir/Madam, I am an employee in a manufacturing company, my salary is 11,000. And my salary is been given from an contractor that my company has contracted with and i get my account only Rs. 9090. His confirmation towards the payment is BASIC + DA = 6341 Other allowances = 4659 ESI @ 1.75% on 4659 = 82 ESI @ 4.75% on 4659 = 221 PF @ 12% on 6341 = 761 PF @ 13.36% on 6341 = 847 So my Take home comes to 11,000 - 1,911 = 9089. The problem is why i should contribute 13.36% and 4.75% towards PF and ESI. kindly give me clarifications regarding this.