The middle class doesn’t understands how investment works or even how or where to invest, or the middle class may not want to take the risk and feel it safer to save but given the opportunity, they may invest.
Too many people "invest" in the products that the finance industry has created to extract them from their money. What appear to be low fees can really eat away a huge proportion of your investment growth - the finance industry gets rich, you just get by.
Well worth a watch: