I do my best to prevent that by being a very valuable employee, with ever rarer qualifications as my career progresses.
You're not being taken advantage of by entering into a contract with an employer for services. He gives you compensation, you provide the services. If the compensation is not sufficient in your mind for the value of the services you provide, then take your services elsewhere. If you cannot find a rival employer willing to pay you more, chances are you overvalued your services, and must either accept lesser pay, or start providing more valuable services.
By the way, don't even start with the "slave wages" which is not even a thing, or "starving to death" hyperbole. The chief health concern among American poor is obesity. Migrant farmers come to the US in the hundreds of thousands, work for below minimum-wage prices, and not only don't starve, but support their families back in Central and South America. Where starvation does occur on this planet, is it almost always where a government, or political instability, not a business, has interrupted the natural flow of goods and services.
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And there you have it. People should look to their own agency instead of begging the government to artificially inflate their value to a business.