K shaped economy with increasing expenditure means the wealthier increase their spending as a portion of the economy and at an absolute level. It is not interpreted as the polity doing well - if anything, it is cause for concern.
I don't know if it is just the wealthy either.
The retired middle class boomers I know are completely outside the business cycle.
While I don't think they have enough to really be considered wealthy, they have no mortgage payment, a social security check, a pension and most have a 401k.
The business cycle will not change their spending one bit.
The wealthy don't buy more crap on black Friday.
Inequality is very visible in terms of what sort of consumption occurs. Gotta look at the qualitatives.