Is it inappropriate and premature to require an individual to set aside additional funds on an involuntary basis?

[15] The court finds that it is inappropriate and premature to require an individual to set aside additional sums on an involuntary basis when he is making available an appropriate amount of support on a periodic basis. To accede to the proposed plan would result in the equivalent to requiring the respondent to put up a security against the possibility of a future event, which has only been required where past behaviour would dictate the need for it, as in the case of James v. James, supra.