How about Comprehensive Ranking Score, the one that currently applied for Express Entry. Modify it and adapt it to PGP, that's it!
Think LICO likely needs to be increased given there has been a pretty large cost of living increase in many areas but the government will get sued if the program is considered elitist and favours only the most educated and wealthy. Anecdotally many less wealthy families actually use a lot less health resources for their parents and grandparents and do the day to day care at home which is very hard work. So the fact that wealthy Canadians have more money to support their parents doesn’t actually mean they use less Canadian resources and actually in my experience many are more likely to have their parents end up in longterm care versus volunteering to do the daily caregiving like bathing, toileting, supervising, etc. which is very physically and mentally demanding.