This doesn't help your argument.
Slater is a 36 yr old backup WR.
For legit comparison, Taiwan Jones is 33 years old and is only getting paid
1.7 mil. That's 1.7 against the salary cap compared to Slater's 2.6.
Matakevich is a 28 yr old back up LB. Guys in their prime get paid more than guys in their late 30s...
Bills also have Bass on a cheap draft pick deal.
Overall the Bills are 22nd in cap dollars spent towards the 3 dedicated special teamers: https://www.spotrac.com/nfl/positional/special/
So, yeah... you need to show actual data that supports your claim. Otherwise, it's hard to take it seriously.