Your perspective is odd and not based on evidence. Happiness does not scale linearly in relation to earnings. It tops out around £40k in the UK, if I remember the stat correctly.

Of course, there are outliers, people whose happiness does scale linearly with their earnings. More importantly, I feel, is the vertigo associated with income, the fear and worry of taking a cut in earnings. Lifestyle expands to fit income.

It does not seem that you have considered the why, only the what. Why do you want $1m? Several others have raised this question here. You will be far, far more satisfied if you spend a time considering this in detail.