Can voters change groups (switch compass/income group)?

For example switch between:
Poor/Middle Income/Wealthy

Chance to become Poor/Middle Class/Wealthy could depend on income and other various things - maybe social mobility simulation could be included.

If you max out wages and poor/middle class income, then poor class would disappear eventually - maybe just have one - two voters slipping here temporarily.

Social welfare, subsidies, grants and other “you must be this rich or this poor” policies would have their cost dependant on median/average income, or even derived from individual incomes if possible.