Mmmm income inequality has actually reduced. Disposable income has fallen for many.
It starts with education and aspiration. Poor advice and poor choices from the outset tie people in to long term social immobility.
Value education, think about what kind of jobs make a lot of money and work back to what you'd need to do to obtain that kind of job. Can be a skilled or professional job - (e.g. construction is a great sector. Isn't just skilled building, it's site managers, programmers, cost planners, h&s roles, QS, building surveyors, project managers, bid writing etc etc - LOADS of career paths, and lots of opportunities for women as firms get out under pressure to equalise such a male dominated industry) - that's an example. It could be any other industry - law, finance, accounting whatever.
But to get into that kind of job, you need education and skills. So as a parent you have a duty to your children to get them to understand how incredibly vital it is to get the exams at school.
Once you're stuck in a low-paying unskilled work it's a total trap - no time to train, can't afford to train, the sort of job you can get offers no progression. Depressing.