I’d tend to agree with this, on the 10% figure.Tithes are not for the modern day church. Israel was a Theocracy and required Thithing the same way our governments require taxes today. Tithes were used to help govern the nation the way our taxes help govern our nations.
Even in the United States, the government in the last 50 years or so has increased the size of the social safety net for the poor. Whereas in the 1930s a poor family might have gone to their church, their neighbors, or a private charity for help, today they’d turn to government social programs for help. So some of that 10% of your income is going to the poor in the form of what we pay in taxes.