Generosity is important. In fact, Jesus talked about money about 40% of the time - more than grace, more than Heaven, more than the gospel. Jesus had to know money was going to be one of those idols that could grab us - and grab us hard.
The greatest sermon ever recorded was the sermon Jesus gave on a mountainside. The Sermon on the Mount starts and ends with the Gospel. Everything in-between is what it looks like to live a Gospel-infected life. Jesus gives us practical life lessons, not to prove we are Christ followers but because we are Christ followers.