A group of friends meet for a regular drink at a hotel every Friday night; each contributes $2 towards a group lottery ticket, which is drawn over the weekend by Lotto company. One of the group is given the role of actually buying the syndicate ticket. When, in fact, a winning ticket is drawn for the group, the purchaser of the ticket claims the arrangement is purely social and there is no arrangement whereby he needs to share the prize. Analyse this issue in terms of contract law