Probably, but you can achieve a 5-6* starting 11 without spending, but it usually involves tanking a Season.

The best luck I have had in Cup is when my Team is closer to average Q for my level... then I only get guys a couple level above instead of a few levels..

Since the Cup is drawn by your best 14, if you have a strong starting 11 you will always be drawn with players levels above you..
who can instantly have what looks like a scout to you, from the TL for a token or two.