Top companies all over the world understand this facts very well that's why they invest into capacity development of their employees, because every thing falls down to Huma capacity development of the individual in the company. In inclusion any nation that wants her Economy to grow and develop should invest in the area of capacity development of her citizens by way of setting up quality educational systems, vocational skills that will make her citizens to be ready and fully equipped to develop their nation when given the opportunity.
OP, let me add a voice to what you've mentioned here. Human capital development is the best kind of development a company or a country can undertake. Also, as an individual, investing in yourself by building your own capacity will be the best form of development you can ever experience. Oftentimes, people get busy at discussing ways and methods in which they can develop the infrastructures of the country among other things yet they forget that human capital is the best kind of development we can ever experience.
This is why those top companies you mentioned also have departments that are purposely tasked with the responsibility of handing human resources, often known as human resource managements or in short HRM. It helps them manage their workforce very effectively to bring about the uptimum result of the company. The same thing goes with countries who pay more attention to their citizens. They tend to achieve more success than countries that focuses on just the infrastructure and other sectors while neglecting the citizens welfare. Corruption looms the latter countries as a result.