These men preferred others over themselves. They put principles first and yes, they may have become wealthy, but their wealth was not at the expense of others.
Consider the bosses of our time. Trump, Clinton, Reagan, both Bush's in the US and Thatcher, Blair and their ilk in UK politics (and business in Trump's case). We are not called to judge men, but we are called to look at the fruit they bear in their lives. Self, greed, envy, fear, hate and doubt are the politics of today. Shades of grey, as I've had on my heart recently, have become the norm. Nobody dares to speak in terms of moral absolutes any more.
And we are called to make a choice as Christians.
There is only one choice.
I call heaven and earth as witnesses against you today, that I have set before you life and death, the blessing and the curse; therefore, you shall choose life in order that you may live, you and your descendants, by loving the Lord your God, by obeying His voice, and by holding closely to Him; for He is your life [your good life, your abundant life, your fulfillment] and the length of your days, that you may live in the land which the Lord promised (swore) to give to your fathers, to Abraham, Isaac, and Jacob.
[Deuteronomy 30:19,20 AMP]