Investment vs. Expenditure:
Some truth here, but the differences are often an understandable result of income inequality rather than the cause of it. Who doesn't need a little pick-me-up treat to make life feel a bit better, the difference is how much you have left afterwards. Even if you invested all your coffee/nails/car valet spending, it is not going to make wealth to anywhere near the extent of someone with a top 1% salary, or inheritance etc. Social class and mobility comes into play too. Plus if you don't have much money you can't afford the type of financial planning rich people can. Money makes money.
I do perhaps see a mindset whereby some people from poorer backgrounds make money, but then spend it flashily, and that's more to do with the social class system, people trying to prove their worth. Within a generation they'll be investing, putting their own kids in hand-me-downs etc.
Upper classes still spend money, just more discreetly. IME there's some truth in the idea that rich people stay rich because they buy second hand cars and clothes, walk round with holey jumpers etc, but the key word there is stay. They had money to start with, plus their social position is assured and so there's no need to spend to prove worth.
Even if a poor woman saved all her coffee/nails money, it would simply give her a backup fund to fall back on if her fridge needs replacing, it won't make her rich.
Refuses to study:
Admittedly those who have seen first hand what a good education and professional job can (sometimes) net you, may have more respect for study, but I work with really bright, hardworking students, who overcome unbelievable home/social difficulties to win places at elite universities. IME they study harder than many of the MC kids I know.
Thinking Big:
Thinking big requires risk taking. It is MUCH easier to take risks (investments, starting a new business, unpaid internship that could lead to amazing job etc) if you know you have a safety net to fall back on. However, poor people still manage to think big despite the massive risk to them. Necessity is the mother of invention. Studies on this show that many of the world's most successful business owners are from poor, often immigrant backgrounds.
Criticise etc:
Not sure. Not in my experience, but there could be an element that you criticise when you haven't got the power to change things.
Buying time:
Rich people do buy time by buying in cleaners, builders, gardeners, rather than spending time doing themselves. But the opposite of this isn't wasting' time, it's just that if you're poorer you can't afford to buy time.
Income flows:
Many poorer people have multiple jobs = multiple income flows. The difference between poor and rich is in what those income flows bring in, and where they're from.
Poor = income comes from multiple jobs.
Rich = income comes from multiple sources (salary, investments, inheritance, property).
This list is totally lacking in real analysis and nuance.