Have you ever heard about outstaffing / outsourcing? It is “an agreement in which one company hires another company to be responsible for an existing internal activity”. Outsourcing is very popular & widespread in IT because usually you don’t need a person on-site & there is a difference in salary.
USA IT engineers have one the highest IT salary. Engineers with little experience usually have more than $6000 per month. There are a lot of people with a lucid mind who ask: is it possible to hire a remote person with more relevant experience and pay less? In the vast majority cases, it is possible. On one hand, they know about the difference between Moscow & Volgograd salary, but on the other hand, it is good enough salary in case of Volgograd.
If you want that kind of work you should know English at least C1 & be at least senior. However it is at the top level, it means that an average IT engineer salary is less. Also, keep in mind please, that every link in the chain from a customer to an engineer decrease the salary because every chain has interest.
What does it mean?
Is it possible to increase the salary? yes.