Liberals being “self-sacrificial/generous” would be a confused view. It’s more an issue of wanting to virtue-signal and seem to be cool with their “in crowd.” Their “generosity” is largely with other peoples’ money. The ones with the biggest SJW mouths expect entitlements to pay for all of their “generosity.”
The conservative view isn’t so much self-sustainment as family sustainment. If you consider how many soldiers come from conservative perspectives, you’ll realize they are not concerned with their survival first.