The job of a person elected to a parliament is to produce new laws and public policy. It's not to simply vote on laws proposed by other people.

The general idea when contacting people should be: "I'm a member of parliament X and I'm writing a law on subject Y. I want to hear from experts on Y to have an informed idea of the subject. I think you are on of the important experts on Y, can I talk to you for you to explain to me your perspective on Y and your ideas of how Y should be legislated?"

When voting on subjects on which you don't have expertise you want to vote with other people in return to them voting for laws you sponsor.