Do you think some of these companies are purposely leaking data? Do you think it is a technical issue?
No offense but your question is so naïve (IMHO) I find it hard to believe you're not trolling. Your browser collects your private data. Your emails are stored whether you have deleted them or not. 90% of the apps on your phone collect your data. On the other hand it's a fact that Microsoft, Google, Facebook etc etc closely work with government agencies and share collected data with them. Your phone (and billing system of your cell provider) tracks and keeps all your movements for years - have you ever checked your location history on your Google account? Ever flied a plane? Congrats, your biometrical data is stored as well and with all these cameras everywhere, well, you know. Just out of curiosity try to have a conversation about any consumer product when your phone/laptop is close to you - all of a sudden next day you'll be seeing that product advertised to you. I can go on and on but I hope you get my drift.