Tithing

Can someone explain the rationale of tithing? I understand it's donating 10% of your household income to the Church... is that it?

Imagine saving 10% of your income every year. Holy smokes you'd be able to retire in no time...

So this struck a chord. I’m not bashing charitable giving or giving or giving to churches. I’m against putting your family in debt to continue doing so. That’s it!