I have hired teenagers for a few hours a week just to give them a chance to get some experience, references, etc. to qualify for a better job. I could have done without those employees, and I couldn't afford to do a lot of that, but to help out I was willing to do what I could.
Having said, that, doing that was my option and prerogative and had the law required me to pay them more than I did, they would not have been hired. Certainly had I been required to pay a 'living wage', whatever that is, not only would the teens have not been hired, but I would have been forced to lay off almost all of my part time people and maybe some of the full time staff.
Those who expect employers to be social benefit agencies are going to be disappointed 99% of the time. Employers can't often afford to hire somebody just to help them out. Employers mostly hire people because they need somebody to do the work in order to create a profit for the business and/or expand the business in order to increase the profit.
Nor do most people go to work for somebody to 'help out' a business. Most of us go to work to earn money and we sell our labor, skills, talent, ability, and/or know how to an employer for an agreed price.
Employees who make themselves increasingly valuable to the employer will almost always merit more pay and get better raises and bonuses than those who just show up, put in their time doing no more than they agreed to do, and then go home.
You want to be paid what you think you're worth?
Stay in school and actually educate yourself. Good grades don't always help but they never hurt.
Stay off the drugs and booze and stay away from illegal activities.
Get a McJob or do something for wages, however crappy, develop a work ethic, acquire some marketable skills, and build some solid references. Don't be too proud to take the job that is available as an employed person will always be seen as more desirable/employable than an unemployed person.
Be willing to start at the bottom but take every chance to demonstrate that you are ready for and deserve promotion.
Be willing to go where the work is instead of expecting it to come to you.
Do that and you are far less likely to be on a message board complaining about low wages or greedy, uncaring employers.