1.) A 5% raise doesn’t even cover inflation.
2.) No one who is serious about wanting a pay raise to stay is asking for an 67% increase in pay.
3.) Leaving because of pay is typically because someone is offering substantially more money/better benefits for a similar position.
4.) You have it backwards you definitely worry about raises in pay, especially before you get a raise of $10-20k.
5.) As someone who has made 60k/yr a raise of 6-10k would be more than enough incentive to stay. It would easily outpace inflation and reward someone who is doing well.