You can find way better things to do with your time and money than work.
You should be loving your job. That way you wouldn't even think about it in a bad way. It might be tough, but working and enjoying the job itself gives a different meaning.
Anyway... to earn in 7 years so much money not work anymore in the future? In case you're not backed by a financial background of your parents, that's pretty much impossible. Anybody who thinks that way sounds like a spoiled little brat, the type of people who'd probably celebrate the death of their parents so they get the money from them. How much money is needed for you to be able to live for 50 years? Not only for yourself, but to have a personal life, keep buying stuff, make family, educate your chilldren etc. It's just stupid think about it because the number is beyond madness.