People will always get bored and people will always want nicer things, so they'll always eventually be motivated to go and get work to improve their lot. UBI won't change that. In fact, it will facilitate it.
Without travel, demand for petroleum has dropped significantly, to the point it was below 0 for a short time.
Financial services can come to a screeching halt as well if people stop buying on credit or taking loans out on housing and cars. Maybe I'm being short-sighted in only considering the consumer aspect here.
More than 100% of pre-crisis income for the service industry is being financed through the expanded unemployment and small business grant programs.
Do you have any sources for that claim?
The investment component is dependent on companies' expectations about consumption (or other companies' investment, or government spending) in the future, and obviously the net export component depends on consumption in other countries. So in that sense the ~70% [1] due to direct consumption understates the true importance of consumer spending to GDP.
[0] https://en.wikipedia.org/wiki/Gross_domestic_product#Compone...