In LICs, many people work in agriculture, and it is hard to encourage industrial development and more profitable types of industry.
Most people work in agriculture or another primary industry.
Wages are low. They are often at subsistence level- people earn just enough to survive
Governments need help attracting investment from more profitable sectors of industry. Technology companies don't want to locate in countries where most people are farmers. This means less FDI (foreigndirectinvestment)
Google's office in London brings a lot of revenue, but need highly skilled workers.