People cannot work permanently on the Visitor visa. The validity of the Visitor Visa :-
For Australia-Visitor visa Subclass 600 for tourism and business. Canada Visitor or Tourist Visa is used for work, study or visit. For UK it is known as Standard Visitor Visa to visit your friends and family members or to attend business meetings. The condition, cost, limit of stay, etc. to apply for Visitor visa differs according to the country standards.