Why Elon Musk is really building Starlink

Well for my rural area average income is around 120$/month(*but for some areas income can be as low as 20$/month). Internet is only cellular with speeds around 0.8 Mbps.
And starlink and other space based internet cost  around 500$, with monthly cost of 99$ so how are Elon musk and Jeff solving problems? In many country's  nearly 33%(including Asia, Africa, South America) of the population has never had a chance to connect to the web(including city area).  
    For a rural area if a community gets a good internet connection they will get better education better health, can easily get jobs, can earn online.

 If they really want to help they should atleast think about how can a poor in a rural area with less income can get internet access cheaper.

In this new era internet should be considered as a basic right.
Only privileged get access to faster internet well in these cases privileged people can help community with funds or with work. Same goes for any space based internet company they should see income bracket of the community and decide cost based on that. (*Not everyone can afford a connection of 500$+99$/pm for someone this ammount can be a huge)